Mains and newcomer hopes in image.
Favorite existing stages are Big Blue and Wily's Castle.
I hope we get the BSL station from Metroid Fusion, Neo Arcadia from MMZ, and the UnderNet from MMBN. If Kai Domeki is added, the frozen crater from the final stage of Moeru! Nekketsu Rhythm Damashii!! Osu! Tatakae! Ouendan!! 2 would be great. Especially if Sambomaster gives the rights for Sekai wa Sore wo Ai To Yobun Da Za and/or Hyde gives the rights for Countdown. Maybe Ready Steady Go as a bonus track to call back to Ouendan 1.