Let's be hoenst here, things that have been heard by verge for mooooooooooonths ago such as Star fox GP and Minecraft content in smash might just be red herring or leakbait that was spread around to pick up bad weed (insiders leaking) within the company. Literally anything that has come true has not taken anywhere this long to get confirmed. So yeah i think that might as well be just fake. If anything, if minecraft content was somehow spotted that long ago, it's definitely not a character, maybe it's related to a stage builder mode that was in early faces or who knows. But yeah, I wouldn't think of it at this point anymore, it's most likely and surely fake like anything that has taken this long to get confirmed, meanwhile true stuff didn't take anywhere this long to get confirmed.