3) Should said alternative versions originate within the main continuity, they would also be considered primary canon, and allowed, if notable enough.
Ex: Thought Robot/Cosmic Armor Superman, the DC One Million characters, and the Earth-3 Crime Syndicate of America all originate within mainstream comics, and feature interactions with the primary DC Characters. Similarly, the Marvel Ultimate Universe was a prominent comicbook line for a considerable time, and the two continuities have recently merged into one, so profiles from said verse are also allowed, as long as proper feats and scaling can be found for the statistics.
4) Franchises which contain non-canonical spin-offs/movies/videogames, et cetera, each with their own continuities and feats, yet not to the extent that Marvel and DC Comics do, should only be allowed profiles for notable original characters from said spin-offs, and not alternate versions of canonical characters, unless they are very prominent and notable.
Ex: Main villains from non-canonical movies of
Dragon Ball,
Sailor Moon,
One Piece and the like can be allowed profiles, yet most versions of Son Goku contained in games such as Shin Budokai should not, as the only difference they hold from Canon Goku lies in their extent of power. However, given the prominence and popularity of Dragon Ball GT, alternative versions of Goku and Vegeta from this continuity have been allowed. If the alternate non-canonical version of a character is notable enough in the sense of having their own feats, and a different role and purpose, then it is possible that profiles for them can be created.
5) Certain franchises also contain a variety of spin-offs and alternate continuities, yet justify their existence due to in-series Multiverses. In such cases, Rule Number 3 still applies, albeit to a lesser scale. Original characters from said works are all allowed, yet alternate versions of original canon characters should not be abused.
Ex: Both the
Puella Magi Madoka Magica and the
Saint Seiya Franchises explain all of their Spin-Off mangas as alternate timelines, and profiles for characters originating from said works are allowed.