There's an idea I had a while back... not the greatest of ideas mind you but it would allow TDO and the Imagineers to keep the Stitch building and most of the show.
Using elements from the previous iteration albeit a short and sweet version of the show with a new pre-show explaining Stitch has glitched; We learn that a glitched Stitch has managed to escape the (theater) building and is running amok in Tomorrowland causing all kinds of mischief. Aided by Jumba Jookiba and Pleakly we are given Ultra Space Communicators (Kim Possible style interactive game) and must find him and report back to HQ so a team can be sent to retrieve him. As guests turn in their communicators they exit a corridor that shows an AA post-show of Stitch's glitch being fixed! The attraction ends as guests then exit out the theatre via gift shop (lol) or into a Meet-n-Greet room to see Stitch and one of his alien friends.
Part show, part game. part gift shop. part Meet-n-Greet. If not this idea exactly; I think a combined show and interactive game could work well for this IP.