Eric O'Grady (Earth 9514)

Eric O'Grady is an ambitious scientist and martial artist that has been studying the work of Dr. Ray Palmer, the former Atom. Eventually, Eric has learnt how to not only shrink down to microscopic size, but to turn into a godzilla sized warrior. Making himself a suit and calling himself Yellow Jacket, he serves as a hero that is eventually recruited into the Avengers by Peter Parker and Terry McGinnis.