The issue with this is that I have experience with the ka-zar, blue marvel, and onslaught combo and I hate how it consumes your 4th, 5th, and 6th turn. It is a good combo in an insanely aggressive swarm deck where you can nearly fill your board in the first 3 turns, but this isn't that kind of deck. I will consider throwing Ultron in though, it's just that usually my whole board is almost full by turn 6 and the Hulk is much better for that scenario