The Super Mario Galaxy Movie, in cinemas 1st of April

[KManX89]

I will say this: it’ll be interesting to see how they explain Fox showing up in this.

We already know from the Kart and Party games Donkey Kong and Mario are canonically in the same universe, so no extra legwork needed for him (and the rest of the DK Crew) appearing in the first Mario (animated) movie. Fox, Samus, Link, etc. aren’t, so barring some incursion/time travel/universe-jumping, it can’t happen. It’s not as simple as him and Mario going to space at the same time in this.