For the Persona fandoms, I was the Persona 3 nominator and I don't mind if they're merged. The games are mostly separate but technically take place in the same universe, so you can go either way with it really. And the Persona Series nominator seems to want some minor crossover*, so I'm fine with merging them to accommodate that if other people don't mind.

* Aigis, Labrys, and Metis are related, so it's fairly common to put them together in fic, but technically they're not all from the same game -- Aigis appears in Persona 3 and Persona 4 Arena, Metis appears in Persona 3, and Labrys appears in Persona 4 Arena.