[quote=@Burning Kitty]
The point.
[/quote]

If I may?  That may be the point, but it's also the problem (and, incidentally, why I get really wary when we start doing these 'ultimate' and/or crossover games): when you're mishmashing concepts together for the sake of novelty, ultimately all you have is the novelty of it.  And when that wears off, there's really nothing holding it up.  Sure, going "ooh, look, Character (x) is in Setting (y) now!" is interesting for a post or two, but the overwhelming majority of times I've seen this done, a post or two is all we get, and then when the player inevitably abandons them, we're either left with characters that nobody wants to use because that incarnation is unrecognizable, or a big gaping wound in continuity that players have to retcon around.