IMO, the logical approach to dining at Riviera is some multipurpose facility. That's what Geyser Point is and it's what they did when renovating Vero last year. Shared kitchen...one set of staff. But they'll have a dining room with table service and a nearby walk-up window offering carry out orders. The quick service window can open to the pool area while the dining room is indoors.
The rooftop restaurant may be open as little as one meal per day (dinner.) Have to wait and see how upscale it proves to be, how popular with non-guests, etc. Maybe they put a breakfast character meal in there, hoping to draw from the other gondola resorts.
The resort will (IMO) have a feature pool. It will have its own gondola stop, bus stop (perhaps with service shared with CBR), front desk, pool bar, gift shop (with groceries available), fitness center. I see no reason they would choose not to add minor amenities like BBQ pavilion and fire pit.
It will probably have some sports courts, but maybe not the full range (basketball, tennis, volleyball) since some will undoubtedly be duplicated at CBR. Similarly, I don't believe BoardWalk has volleyball court but Beach Club does.
IMO, the main unknowns are relatively minor things like:
Spa: maybe, thinking that it could draw added business from CBR, POP and AOA.
Community Hall: Probably. BLT is same size and it has one.
Marina, bike rentals and other recreation
Valet parking