A marketing company—Ryu’s Office—associated with Atlus has registered several Persona-related domains: Persona5R.JP, P5S.JP, Persona5S.JP, Persona5M.JP, P5M.JP, P5B.JP, and Persona5B.JP.
No other details have been revealed as to what these new domains could mean for the franchise. However, given Joker’s (the fifth game’s protagonist) inclusion in the first DLC for Super Smash Bros. Ultimate, a strong possibility is that Atlus may be porting an updated version of the game to Switch.
Atlus is no stranger to updated re-releases, with Persona 3 and 4 both receiving updated ports in the form of Persona 3: FES and Persona 4: Golden. Other possibilities include a free update or an example of Atlus tying up possible trademark overlaps.