[All-Fandom: DC and Marvel] So What Did Jason Do Wrong?

After being submerged in the Lazarus Pit, Jason saw fragments of the future in his madness. He realized that he wasn't an irreplaceable Robin to Batman, and that he was expendable to the Wayne family, who even had better children without him. So after leaving the League of Assassins, he didn't return to Gotham. Instead, he went to New York to learn how a normal person should live. Meanwhile, the others also saw fragments of their own futures. [Note: All the future fragments involve Jason, but they're from parallel universes, covering all kinds of possibilities.] And so... Batman from the world where Jason died again saving him. Nightwing from the world where Jason had had enough of being misunderstood and never came back. The Joker from the world where Jason was his lover (undecided). Harley Quinn from the world where Jason was a child who died young. Tony from the world where Jason was his biological younger brother who died young. Captain America from the world where Jason and Bucky were childhood friends. From... Still being worked out... Things to know before reading: 1. I'm a shameless, uncritical Jason fan. Everything that happens is for the sake of shamelessly praising Jason, so don't expect too much from the writing. 2. The pairing hasn't been decided. 3. I'm writing this for love. I start new stories whenever I feel like it.