They talked about Soarin on the Dis this week.
They aren't even done with filming the new in-ride film, but they may also built a third theater to cut wait times. When they do this, they can close down 1 other other theaters at a time so they can retool it for the new film. So THAT way, there will always be at least 2 theaters running until they get everything running.
Long story short, I don't think it will be closing anytime soon.