something i just thought... Possible Stop n' Swop theory.

i was just replaying this amazing game, and i was searching secrets. im sure this has been discussed before, but in the fungi forest entrance room there are three doors, the one with the fairy, the one that opens when the mushroom is shot at. but there is one that is close to the door, that has no function. it looks like the others so maybe this was the entrance from the banjo kazooie world to this one. but what would bk do here? enter fungi forest? i can't imagine the player taking bk and going to angry aztec or other worlds. maybe fungi forest connects with the rumored fungus forest of bk. idk what do you guys think,
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Psn: Jigsaw1621