-But nothing we saw so far indicates that he will. In fact, it seems that he has taken the not changing history side.
(Not to mention that, in the Donner movie, Superman does change history by going back in time to save Lois.)
- But that's what an emotionnal conflict is: something you know you must do, but that is hard to do emotionnally. I mean, gee, where did you ever get the idea he would be tempted to accept H'El's plan? Did you see him accept H'el's plan? Did you even see him consider accepting? Because what I saw was Superman telling him to go to hell with his "we can save Krypton together" thing. But that doesn't mean it's easy. It's pretty much the kind of emotionnal stuggle most people hope to never encounter in their life.
-Considering that I doubt H'El's plan will ever come to pass, I don't think he really to right now.