The succession boxes don't really make much sense in this context. The actors played Lex Luthor in movies and in television, with different fictional time periods, and in a number of different spin-offs. Each actor never really had a specific tenure of being "Lex Luthor". Personally, I think a better idea would be to create a sub-category of Category:Superman actors called Category:Actors portraying Lex Luthor or something similar. On the other hand, I would say that the succession boxes make sense for something like James Bond, which seems to have an established centralized franchise with a rather clear timeline. — talk