I expect the following from 2.3:
Complete rework THZ3, DSZ2, DSZ3, ERZ, BCZ, AGZ and ATZ
Quality of life GFZ3, DSZ1, CEZ3, ACZ2, FHZ, HHZ and all NiGHTs special and bonus stages
New multiplayer special stages
Removal TLZ
ATZ midi (?)
More bonus, challenges and NiGHTs stages (?)
RVZ2 and 3
Fully...