I'm guessing 2 mild thrills (think Test Track-level), 1 dark ride, and 2 flat rides. That's guessing though. My hopes would be a Splash Mountain-esque log flume based off Super Mario Bros with several AAs and environments from Mario games, a Test Track-esque Mario Kart ride, a Luigi's Mansion dark ride, a Yoshi flat ride, and a DK mine train family coaster. Also, near the DK family coaster and Yoshi flat rides could be some small kiddie play areas, themed to Donkey Kong Country and Yoshi's Island respectively.
This would then take up most of the plot, so if they would want to have Phase 2 with Hyrule or Pokemon Land, that would have to go in IoA, replacing either TL or LC.