Team 1: The Mighty Avengers (Iron Man, Ms. Marvel, Wonder Man, Ares, Wasp and they can have Sentry if they can't do it without him)
I've yet to see any mention of Stark's armor having adamantium, so unless he finds out early to keep his distance, he'll be in bad shape. Beyond that, Marvel, Wonder Man, and Ares (since he can't die anyway) have the best shot here. Although, I see a couple of them getting facehugged.
Team 2: The New Avengers (Spider-Man, Ronin/Clint Barton, Wolverine, Doctor Strange, Spider-Woman, Luke Cage and Iron Fist)
Cage will have to hope that his skin holds up, otherwise he has a problem. Other than that, everyone will be fighting for their lives, naturally. A few more get facehugged, (except maybe Peter, who'll have a time having to deal with the swarm). They better hope Strange comes up with something, quick.
Team 3: Combined Avengers Teams
Same as above.
Team 4: Fantastic Four (Reed, Sue, Johnny and Ben)
They have a much easier time. Only Sue and Johnny are needed to combat the aliens (Johnny especially since they're afraid of fire), and can give Reed enough time to figure out what they're dealing with. Ben could be helpful, but if he tries "clobberin'" one, he may end up in a world of pain, even if his durability does hold up against their blood.
Team 5: Fantastic Four with backup (F4 + Storm, T'Challa and She-Hulk)
Basically the scenario, with BP helping Reed and Storm helping Sue and Johnny.
Team 5: Astonishing X-Men (Cyclops, Emma, Colossus, Wolverine, Shadowcat, Beast and Armour)
Hard to say, especially since Wolverine likely won't be in the best of shape by now. Although, Colossus will be lucky if his body can handle the acid, but part of me doubts that.
Team 6: X-Men (Havok (no sun amping), Storm, Rachel, Polaris, Nightcrawler, Archangel, i intentionally left out Iceman due to his inability to really die)
Again, hard for me to say.
Regardless of what happens, someone's gonna have to find a way to get the helicarrier towards the ocean or something. With all the dead aliens, the base is gonna crash, unless the Sentry's there to catch it. 🙄