It would be a good idea, yes, as I'm sure this unwritten standard will be "silently" breaked eventually otherwise.
It would be an editing rule, BTW, and could go like...
"Regarding the name of character pages, parenthesis that clarify the IP it has debuted on, rather than just the verse itself in cases when there's simply another character already with the same name (Otherwise the page name is to be the character's name with nothing else), should only be applied in cases where:
- It's required to separate a Canon from another for clarification purposes, such as Son Goku (Dragon Ball GT) and Son Goku (Dragon Ball Super)
- A timeline period across the same character that has been divided across multiple profiles for organization purposes, for example, Son Goku (Dragon Ball) and Son Goku (Dragon Ball Z)
- There are other characters with the same name in the same verse (Even if simply related), as is with Link, however, in-verse name specifications for each case may be given more priority, if avaiable, and don't fall in other criterias already.
- The verse in question as a whole not having a proper name beyond the author/company involved for them, like with Nasuverse and 07th Expansion Series
Otherwise it's confusing and unecessary to deviate from only mentioning the respective verse."
If this gets accepted, I think some BlazBlue and Shinza Banshou pages may require a rename as well on some pages.