WARNING: THE FOLLOWING POST CONTAINS MASSIVE AMOUNTS OF OVERTHINKING AND IS REALLY BORING
I'd really like (but am not expecting) a Wonder Woman movie next year.
Then a Justice League movie the year after. A very small team, just Superman, Wonder Woman, The Green Lantern (Ryan Reynolds as Hal Jordan rather than attempting another reboot), The Flash, and Batman, ideally with Christian Bale as Bruce Wayne. It would never happen, but it should do.
Then move into phase 3 (phase 1 being the Dark Knight trilogy plus Green Lantern (!), phase two being Man Of Steel, Wonder Woman, and JL), which would give The Flash his own film. I'd be tempted to introduce one of Aquaman, Mighty Martian, or Captain Marvel. Then if the Green Lantern is well received in JL, I'd give him a sequel, if not then have another intro story for one of the aforementioned. I'd look at a Nightwing film with Joseph Gordon. Finally, a new Superman film (Man of Steel sequel) before JL2 to conclude that storyline.
If I may remain in the world of fantasy for a little longer, I'd like to see an Avengers-Justice League metacrisis film. It would never work (because for the studios to work together they'd need to gross double what an Avengers or JL movie would get, which simply isn't possible) but I will keep dreaming. In fantasy world, I'd like Superman, Supergirl, Batman, Wonder Woman, and The Flash to represent the Justice League, plus Iron Man, Captain America, Thor, The Hulk, and whilst I'm in fantasy land I'll draft in Spider Man too. Thanos releases Doomsday into the Marvel Cinematic Universe. That would be so epic.
However, leaving aside that most outlandish of fantasies, I think after JL2 we'd be ready for a Batman reboot.