What Series would Mario x Rabbits: Kingdom Battle Fall Under?

[CuriousUserX90]

Personally, I'd either put it in the Mario series or create a new Mario x Rabbids series, as you suggested, though I'd be leaning more towards putting it with Mario directly.

Recently I posted a Submission for the game, and put it under Mario + Rabbids, as it's not just about Mario, like with the Mario & Sonic games and the Mario vs. Donkey Kong games.