Let's be honest, Gamefreak knew full well what they were doing when they designed Incineroar. The entire fan base was calling for blood over fire/fighting after gen V, and the heel wrestler theme was a perfect way to generate controversy and get people hanging on their every word for hope. It was nothing more than a marketing ploy

this bunny isn't going to be fire/fighting, not when the can bait us all the way to the bank and then reveal it was fire/ground all along