That goes without saying. All Disney lines can amazingly max out at 3 hrs or so. Yeah, FoP showed longer than that, but I don't think anyone ever said it WAS that long. Folks seem to cap their waits at about 3 hours for new to them rides. This ride will be just like the 2 SW ones. Huge, A/C'd queue. New tech. Should be quite unique.
Popularity isn't really why Disney rides get the lines, it's too many people and not enough E tickets, or even D tickets. NRJ will have a 2 hour line tomorrow, and FoP 2.5 probably. Clearly, popularity isn't the main reason.