Some have theorized that SuperDad and the new52 Superman may in some way merge together when it's revealed that both universes are essentially the same universe. The other new52 characters are getting some memories and feelings from their pre-52 versions, which is of course my preferred path for new52 Superman, that he stay intact as himself and that they maybe add some memories and experiences where necessary to coincide with what's happening to everyone else. It wouldn't be horrible to have him remember events and villans and such from previous to the new-52, if they kept his basic traits like age, personal history, his own memories of the past five years, and his personality intact.
However, that doesn't sound like what they are doing. Instead, SuperDad looks to be replacing new52 Superman entirely and, honestly, my view has been fairly consistent that, while I do not in any way want SuperDad here as the main Superman of this universe, and want new52 Superman to return to his rightful place in this continuity, that they were going to keep new52 Superman dead permanently barring a collapse in sales (With the exception of perhaps a cameo in a crossover event, or a turn as a villain).
However, recently, new speculation has cropped up saying that perhaps if SuperDad is the only surviving Superman, that he might be merged with the new52 Superman. Honestly, to me this would be much better than just going forward with SuperDad and not seeing new52 Superman again. If we got a SuperDad/new52 Superman hybrid character who remembered the last five years of stories and relationships, that'd be something. It's not ideal, but it's better than just having SuperDad take over and never seeing new52 Superman again. To me, having the last five years count is a big deal. I want whichever Superman remains to remember the comics I've bought and read.
I've been kind of looking for a way to go forward with the Superman line. It was tough because they were killing off my favorite character, essentially tossing out most of the comics I have from the Superman continuity in so far as the remaining Superman would not have experienced them, adding in a SuperKid, and so on and so forth.
If they could just toss me a bone by making this Superman have some elements of the memory and the personality of new52 Superman, that'd help a lot. I know it sounds like a small thing, especially since SuperDad would likely be the dominant personality and keep the kid and the wife, but just merging them together would at least make it so that it's still kind of the continuing adventures of the guy I've been reading about to some degree. It'd also mean that eventually we could have Clark return to the Daily Planet eventually and renew his friendships in a relatively organic way, rather than him being someone who doesn't know these people and who these people don't know, where it would see forced. If he remembers hanging with Jimmy and quitting and rejoining the Planet and everything else, and is 50% or even 30% that Clark Kent, that would help a lot.
I've been looking for a reason to continue with the line, even though I have little interest in SuperDad and detest the changes, and allowing the new52 Superman to actually be part of some kind of merged Superman might be the lifeline I need to keep reading.
That might explain why Superman isn't wearing the trunks, also.
It sounds odd to say that this would make a big difference to me, but it really would- any way for new52 Superman to live on as part of the Superman in the books going forward is something that could give me what I need to stick with the books. I'd rather just have kept my guy around, but if the choice is kill my guy off and put a totally different guy in his place, or to merge my guy with the other guy and have him keep my guy's memories, I'll take the merger.
A Superman without the last 5 years of adventures will always be incomplete to me. If Rebirth is about reconciling different versions of characters- they need to do something to give us part of the Superman we've been reading about for 5 years in some way- sort of an ultimate Superman who remembers everything from 1986-2016, both post-Crisis and new52. Maybe they can even merge in the first two Supermen. It'd beat the alternative of just SuperDad flying around.