Bigfoot ceased running events for the
Monster Jam series in 1998 due to a dispute over involving licensing of video footage and pictures, and has not returned since.
So its probably not Bigfoot.
EDIT: Anywho, my thoughts
Kick: Has got to be Soccer/World Football. They did American Football, but that a very regional thing. A soccer transformer could be sold in Japan, the UK etc. etc.
Race: I hope it's the Mach 5 from Speed Racer, though I've seen speculation it might be F1 related.
Green: Could be anything, really. Yellow was Tonkanator, Blue was Sonic/Tails and iirc Black is the rumored Batman figure. Someone suggested Halo and I could see it. Green is the Xbox color, Master Chief is Green and the Warthog is green. Makes a lot of sense.
Song: People have suggested K-Pop Demon hunters and Hasbro already has a relationship with Netflix, and given how much it blew up, I honestly I think a K-Pop Demon Hunters is likely.. which is why I don't think it's this. They'd want to get that out into every store possible, not have it be a SDCC exclusive. Dunno what else this could be. Maybe another collab with a musician like Project Jam? (J. Balvintron)
Monster Jam 1: Probably gravedigger, though given it's "1" they might go with a different truck to start with
Cemetery: I would have guessed Gravedigger, but *see above* Honestly, this could be anything, probably something spooky. If it gets us an official hearse Transformer, I'd definitely be interested even if it's not a crossover with something I care about.