This seems to be the main point of contention though. Some believe their marriage would've dissolved. Some believe it would've continued. It may actually warrant a separate thread entirely. But based on the actual content of Morrison's run and the many X-men comics that preceded it, I think it's more likely that the marriage would've remained, assuming Quesada didn't demand it get retconned.
I also don't agree that Schism would've happened in the same way. That was largely a clash between Cyclops and Wolverine. If Jean were present, I don't thinks he would have let it get that severe. Now there still would've been a schism of sorts. But if it was going to be between anyone, it would've been between Jean Grey and Charles Xavier. Xavier trusted Jean to carry on his dream after he stepped down. However, the events of M-Day may change that. She might start making decisions that Xavier doesn't agree with. It could very well lead to a sort of psychic clash of sorts, one that ends with Xavier restarting his school while Jean stays on the west coast. I think thematically, it makes sense that Xavier's star pupil would eventually rebel on him. That would be a much better schism, in my opinion.
I also don't think that Jean's presence precludes Hope's existence. M-Day happens regardless of Jean's presence. So the need to fix it is still there. Hope would probably still be born in the same way. The Messiah Trilogy really wouldn't change that much, but I do think Jean would've handled Cable differently. She might have tried to get him to stay in the present so they could raise the baby. I can see her wanting to protect that child. However, regardless of what she does, it's really hard to say whether AvX would play out. Depending on how Jean would handle Hope, it could set up a very different kind of conflict involving the Phoenix. We can speculate, but the possibilities at that point just become too broad.
It would have been a lot more interesting having Scott and Emma try to be a couple WHILE Jean is alive versus what they did. It felt like they had to have Jean dead so Quesada can have his hard on for Emma and legitimately keep her with Scott. He hates red heads for whatever reason.
And a lot of the events would have taken a different turn. I'd imagine in the end it would have been Jean's Xavier to Scott's Magneto which would have been awesome and exciting to see. It would have been too organic and made too much sense. Instead we got Wolverine as headmaster to oppose Scott.
I don't agree that the schism would've happened between Jean and Cyclops though. One of the big impacts of Jean's death was that she was no longer around to influence Cyclops. Conversely, Emma was around and she didn't influence him in a very positive way. She pushed him to be more vigilant and militaristic. That's a big part of what led Cyclops down the path he went. Jean wouldn't have pushed him like that. She wouldn't have held him back, but she wouldn't have pushed him the way Emma did. And he'd listen to her, just as many X-men listened to Jean over Emma. She just has that kind of pull on people. Plus, if Jean played the role of a diplomat, which was more her style than Cyclops, then he never would've had to go in that direction in the first place.
If there is a schism in this scenario, it's not between Jean and Cyclops. It's between Jean and Xavier. We don't know how Jean would've reacted to the events of M-Day, but I can't imagine she'd stick to the same script when the entire mutant race is on the brink. I can see her and Xavier diverging gradually as the X-men struggled to survive. I can then see it really getting bad after Messiah Complex. It could culminate in an AvX scenario where Jean is the one who kills Charles Xavier and not Cyclops.
Imagine that for a moment. Jean, the one Xavier entrusted to carry on his dream, ends up being the one who kills him in her effort to save the future of the mutant race. Now Jean could certainly be under the influence of the Phoenix again. Hope's presence, along with Wanda's influence, could cause all sorts of chaos that leads to a confrontation where Xavier just can't avoid it. Jean has already endured the burden of indirectly destroying a planet. I think the burden of killing Xavier, even if it's indirect, would be really devastating, but very powerful story that would've taken Jean in a different direction. Too bad we'll probably never know what that story could've been.
Schism happens for the same reason I think AvX happened. It is editorial mandated, but Xavier was not a big character at that time. I don't think he was important enough to be a cause for a Schism. He had pretty much fallen off the X-Books completely around that time. So the Schism would need to be between the big X-Men left, like a Wolverine, Cyclops, or Jean. If Jean was still around I don't really think they change their views on Magneto. Marvel never seem to want to make him a villain again even when they had the opportunity. They retconned what Morrison did with him, in AvX they walked him back being a villain and sort of made Scott take most/all of the blame, following AvX they teased him being a "traitor" but they walked that back, and even in IvX they could have made him a villain but they put the blame all on Emma. So with Wolverine being an Avenger they wouldn't have made him the antagonist in Schism and AvX and it would have to be Jean and/or Cyclops.
If Hope was still created I think they would still have Cable, or someone, raise her in different times so they could quickly age Hope up, but if Jean was still around I imagine there would probably be a lot of speculation about her being Jean's daughter, but it is tough to say what role she would play. Maybe they would have found a way to take Jean off the table to focus on Hope? Put Jean in a comma or something? I have no idea.
Your point got me thinking if Jean and Scott had ever really been on the opposite side of a divisive issue before? I don't recall a case (other than Emma) where that happened so I'm not sure I see Scott and Jean diverting far enough apart to come to blows (ala AvX). I am still missing a chunk of the 90's though so I could be wrong.
I don't think much would have changed, except Schism, it would probably be between Cyclops and Jean. Or to everybody surprise Jean could have sided with Scott in Regenesis.
I'm not an Emma hater, I loved her as the White Queen and as the headmistress. I never really felt her as Cyclops's lover. She had more chemistry with Sebastian Shaw, Magneto, or Banshee. As the White Queen was introduced by Claremont, she was an older woman. Beautiful, but older. She referred to the X-Men as young people and kids.
And when Cyke first approached her with his marital problems in Morrison, she called herself "Auntie" Emma.
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