I don't really care for the Hippogriff coaster. I wouldn't necessarily mind it, but I'd be happier with a replica of Hagrid's Hut with a puppeteer-ed Buckbeak, similar to Singapore's velociraptor. Visitors of USH are absolute suckers for photo-ops.
I think we'll be getting The Three Broomsticks, but it'll have to be fairly small. The Three Broomsticks in Orlando has a huge inside portion, along with an extended outdoor seating area in the back. On top of that, they even squeezed in Hog's Head.
I'll be really sad if we don't get at least most of the shops Orlando has.. I mean, they've announced a fully immersive Hogsmeade for us, right? Wouldn't that imply that we'll be seeing the same shops? Filch's Emporium of Confiscated Goods is a must, since it's the attraction's gift shop. Ollivanders is necessary as well, to bring the wands into play. Honeydukes will house all the candy, and Dervish & Banges will have more generic goodies. We could really do without the Owl Post (stationary) and Zonkos (jokes/toys), but I wouldn't mind seeing them here either..!