[quote=@AndyC]
I suppose while we're taking about creating canon, we ought to work out exactly how much of each canon we're allowed to shape.  The DCU, after all, has tons of legacy characters and spin-offs and whatnot, so it may behoove us to clarify the rules around, say, if someone wants to have Wally West be the Flash first, or someone wants to play Damian as Robin before Dick Grayson shows up, etc.
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I think, in the case of Pitch 2, it would have to work on a case-by-case basis... as long as the applicant keeps in mind that this would be a Year One setting. So if someone wanted to apply for Supergirl or Batgirl while their predecessors are just starting to cut their teeth, that'd obviously clash. But if there were a way to play Kara Danvers or Barbara Gordon another way, in a way that makes sense but is also sidestepping the sidekick element, I think that would be viable. Damian Wayne would be trickier since he's Bruce's son.

Overall, my advice is that it'd just be best to submit an app with a back-up plan in mind.