While Batman is very good with prep, Rocket starts with much better resources; anti-Thanos mechas and Celestial heads are quite good enough to challenge herald preps, despite the fact Diana is enough to put them in danger.
I think team 2 wins conclussively the first match and the second its likely to go for team 1, with Diana taking some wins because of her magical prep and Batman countering some elements of the animal team's prep.