Universal seems to be focusing on internal IPs for individual attractions. Outside IPs seem to be mainly for entire lands now. This makes many of the great ride suggestions here unlikely (unfortunately).
SLoP was the rumored replacement for the TL theater, though a member has said that Sing will be taking its place in Orlando. I have trouble believing this, but anything is possible. The theater has been kept in working order. It is used for special events and for practicing upcoming shows like Bill and Ted. A team leader on site did tell me earlier this week that the only rumor he was familiar with for the theater was SLoP being built there.
A recent article said the purchase of DreamWorks was one of opportunity, not planning. This suggests that plans for TL itself are in flux as the potential IPs internally available have changed. I could see a scenario where the theater gets Sing short term as a stage show before bigger changes happen over the next couple of years.