Inspired by both recent thread necromancy and my own viewing of the entire animated Justice League series, I considered the implications, etc. of the establishment of a JLU-style superteam in the CU; that is, a single superteam comprising the near-unanimity of the world's superheroes.
In my contemplations, it occurred to me that the catalyst for such a superteam already exists in the CU: UNITY. Here are the necessary changes:
1. Move their HQ from NYC to UNTIL's GATEWAY space station.
2. Given the reluctance of the General Assembly to fund additional teams (CU, p. 137), UNTIL performs an administrative maneuver and decides to expand the single team to include an indefinite number of members. In keeping with existing UNTIL policy (ibid), no more than eight members will be assigned to a given mission except for extraordinary circumstances.
3. UNITY starts recruiting other superheroes, starting with those who already have UNTIL sanction, or other official relationships with UNTIL, and expanding out from there.
And that's where my thoughts end at current.