Here's my suggestion:
empty out the other side of the show building. Find storage for your floats, christmas tree and other maintenance crap elsewhere. Plenty of land on property to stick up a new Titan Shed (or find a small soundstage that doesn't get used much and use that for a while.
install a load bearing mezzanine.
Install a multi-level tracked (or trackless) vehicle system.
Utilise physical sets and 3d\4d animation for a looney-tunes styled attraction (think Justice League \ Toy Story Midway Mania). One could even run the storyline similar to the previous LTRR (but without the water) about bugs escaping and tunneling through to Australia - a good tip of the hat to the former attraction whilst giving it a new take \ angle.
While i realise JL is in the park, and is very similar, this would be suitable for all ages, but aimed more at kids. the multi-level gives another aspect. If they give it a similar effort to Doomsday or Rivals, which seems to be their new standard, then they should pull it off and it would be a great addition to the park.