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.