Personally, I think going case-by-case is the best bet. It's far too subjective an issue to do a full ban or full 'okay' on.
On one hand, I know some canons have a lot of overlap between the various incarnations (some of the animes and mangas, I've heard, though I don't know for sure), or, like, Buffy the TV show and Buffy the comics. Anyone trying to app Buffy from the comics to compliment a (hypothetical) pre-existing Buffy from the show would have a very hard time justifying that Buffy as a distinct character from the first.
On the other, take something like Transformers, which has been around for twenty years and had, like, a billion different canons in several different media. Yeah, there's a lot of overlap between, say, G1 and the Dreamwave or IDW comics, or between the Unicron Trilogy series, but you definitely can't say that 'Bee from G1, the movie, and Animated are anything remotely resembling the same character.
I think it's best left up to the discretion of the mods, on a case by case basis, and perhaps the players of other characters in the canon in question--running it by the muns already on the comm to see if they think there is enough difference.
no subject
On one hand, I know some canons have a lot of overlap between the various incarnations (some of the animes and mangas, I've heard, though I don't know for sure), or, like, Buffy the TV show and Buffy the comics. Anyone trying to app Buffy from the comics to compliment a (hypothetical) pre-existing Buffy from the show would have a very hard time justifying that Buffy as a distinct character from the first.
On the other, take something like Transformers, which has been around for twenty years and had, like, a billion different canons in several different media. Yeah, there's a lot of overlap between, say, G1 and the Dreamwave or IDW comics, or between the Unicron Trilogy series, but you definitely can't say that 'Bee from G1, the movie, and Animated are anything remotely resembling the same character.
I think it's best left up to the discretion of the mods, on a case by case basis, and perhaps the players of other characters in the canon in question--running it by the muns already on the comm to see if they think there is enough difference.