I don't think there is any way that team 1 takes it 10/10.
Captain American and Batman would be pulling more than their weight, easy. Those two don't get the luxury of fighting street levelers (though I guess most of that team is low Meta..). For the most part, they're having to stand should to should with all their Herald/High Meta level friends and fight thier Herald/High Meta level enemies.
I'm thinking Black Panther is the weakest member on the list.
That may be the case, but I've never seen him to do anything that Batman couldn't replicate, personally.
In my opinion, unless for some reason Cap is fighting like he's "just peak human," he's going to be the one leading his team. He has just as much tenacity as team one, and arguably more "heart" too. He's not going to let them pair off into 4 different 1v1 fights, he's going to force them to fight as a team. Cap is a moral booster and is (again IMO) the best battlefield tactician in the match, especially when it comes to group.
Most of team 2 has fought on a team together at some point under Cap, and Batman has been a second in command on his own team plenty of times.
I think Team 2 has more than enough to at least match the power advantage that Team 1 has, and should be able to at least split this thing 5/10.