Are you talking about the same Maliboomer that I know?There are no motors from the Maliboomer left there. What's left is the foundation for the three towers and possibly some air compressors which is what powered this attraction - air. The mechanisms that propelled the ride vehicles were built into the tower structures.
This would be an interesting discussion if some of you would suggest realistic ideas, but there is absolutely NO room for a dark ride of any kind within this area unless you want Disney to purchase one of those trailer mounted dark rides that you see at places like the LA County Fair and OC Fair.
Personally, I think they should've left the Maliboomer in its place. It was a great ride and probably the best themed tower ride ever. However, since it's gone I don't think you can really do anything with the space since the footprint is really too small for most rides. Also, a parachute tower is too similar to Jumpin' Jelly Fish and too similar to what they removed so what's the point?