I am not around long enough to vote but I saw this and thought maybe I could help (obviously if a mod comes by and corrects any of it they > me)

When I asked about this for the various comics universes, the answer was "as long as they are significantly different" it was a-ok. So, like, really only one version of Wolverine because they don't...vary much outside of the crazy one-shots and what-ifs where there really isn't enough to app from anyway, but someone could app Main Universe Spider-Man and someone else could app Ultimate Spider-Man; or Main Universe Dazzler and Ultimate Dazzler or something like that.

If that helps?