Remasters of Metroid Pime 2: Echoes and Metroid Prime 3: Corruption are a given. It doesn't make sense do make a remaster of Metroid Prime 1 and then later on release Metroid Prime 4, leaving a gap. But maybe not both remasters will be released within the FY25.
The biggest question for me is if Nintendo will really show Metroid Prime 4 at the upcoming Nintendo Direct or not. On the one hand, it's overdue to show something of Metroid Prime 4, on the other hand, it's graphically the most ambitious game Nintendo has ever made, therefore, it would make much more sense to show the very first footage/trailer for the upscalded version as part ot the Switch 2 reveal.
A new Donkey Kong game for the holidays would be great and kinda big. Also, I expect another Pokémon remaster/remake and/or another spin-off. I guess a Jul. or Aug. release for the spin-off and a Sep. or Oct. release for the remaster/remake. Maybe Nintendo will even have a 2nd holidays title with another Mario Party title or maybe a new Tomodachi or Nintendogs/cats game. For Jul. we maybe get Mario & Sonic at the Olympic Games 2024 in France from Sega but as they communicated that sales of the last iteration (Tokyo 2020) were disappointing, Sega is maybe done with this series.