Title pretty much says it all.
Should we consider Superdad a continuation of post-Crisis, or a new version unto himself?
It wouldnt be the first time two versions of Superman shared a history that diverged at some nebulous point, and while there's clearly a lot of post-Crisis in Superdad, there's also a fair dose of pre-Crisis in there too, and perhaps most importantly, a big chunk of something new.
Would the impact of Reborn alter your opinion? Would you say "yes" if we learn Superdad is really an "ultimate" Superman who has lived most of his publication history (with certain contradictions removed) but "no" if Superdad is just post-Crisis who took a five year vacation?