First off, I see Screw Attack messing up this Death Battle by violating one of the rules of the show. Namely, this one:
[quote]To get as many common abilities as possible, [b]the warrior will be shown at their latest depictions or their oldest age as an active warrior.[/b][/quote]
In this case, the latest depiction of Zero in Mega Man canon is how he appears in Mega Man Zero 4. I have a feeling ScrewAttack will mess this up by either not mentioning his Zero series feats and/or not depicting him as he appeared in the Zero series during the fight itself.
Also, who do you think will win?