Well it only took 3 years for FFVII on Switch to be announced after they added Cloud to Smash so don’t hold your breath.
Joker has been on a Nintendo platform before, in Persona Q2. P5 would be a nice addition to the Switch, though. Great soundtrack, impeccable style and a really intricate combination of battle system and social relationship sim. Shame about the misogyny and homophobia but idk, Japan I guess.