Unfortunately no official announcements have been made yet regarding the specifics of the new rides they are building. However, we do know that many of these rides will be coming from the scrapped Six Flags Dubai project. They will be reusing the ride designs, and some of which we have been told are record breaking attractions.
People have speculated that the Motiongate Dubai expansion will occur in the Lionsgate section. Although from what I've heard this has not been confirmed as well.