Even setting aside Live & Learn and Open Your Heart, I don't think any of the final boss themes of the modern era have had the same catharsis as I get out of What I'm Made Of and With Me. Both Perfect Dark Gaia and Solaris came the closest but just lack the same bite without the vocal performances.
I can't argue too much with With Me tbh. Still one of the best final boss themes in the series. I should make a thread about vocal final boss themes and see what wins.
That's the ENDING theme?! God damn, if they're letting that banger be for the ending, then how hard is the main theme going to slap??
They're flexing on us. We are not ready!
We've heard the instrumental in the Nintendo Direct trailer, and a vocal snippet of it in a Japanese commercial. It does indeed seem to go pretty hard.
I wonder if that's actually the main theme.
But people ! We now know what's winning Soundtrack of the Year !
Though I suppose Mario+Rabbids: Spark of Hope's sound team is also stacked.