We could probably see a new Mario + Rabbids trailer here, so I guess that would be what I’d hope for.
Also, why would Metroid Prime be showing up here? I wouldn’t exactly call Retro a “partner” for Nintendo.
Mostly because it was announced with a title card five years ago and we've heard nothing since outside of development being restarted. I'd love to hear about it, but I assume it's been quietly canceled or will remain stuck in development hell.