At the end of the fight with Superboy-Prime on MOGO Kal-L spoke to Lois much in the same way that New 52 Lois spoke to New 52 Superman when she was dying. In Rebirth Wally says something that has struck a chord with me. He mentions that the whomever is responsible for the loss of ten years started with Flashpoint, however, they may have been there manipulating things even before that.
The reason that E-2 Superman came back from the Paradise dimension was because of the blatant darkness that had encompassed the universe since COIE. Rebirth is also the reaction to a blatant darkness that is taken over the DCU since Flashpoint (and possibly before).
The way that these characters reacted upon death is incredibly similar and it makes me wonder if since Geoff Johns is directly and indirectly involved with those respective stories if they are somehow tied together as this is a continuity and definitely era spanning story as evidenced by the 3 Jokers and Psycho Pirate's involvement in the initiative.
What do you guys think?