To be fair if this is real, Mario+Rabbids sounded atrocious when first leaked and that turned out to be good. This still sounds like a better idea than that did.
The problem is Star Fox has had an inconsistent pass with leaks. I remember people were hammering on the rumor of a Star Fox and Metroid crossover, which turned out to be false. I get that other websites supposedly have heard similar things, but the official rumor leak we got was a piece of paper with a logo. It's one of those wait and see sort of leaks.