THE AVENGERS OF SUPER-ACQUAINTANCES:
Squirrel Girl (Spongebob Squarepants): Upbeat, bucktoothed leader and owner of the team pet.
Butterball (Patrick Star): Uh...I think this one is pretty obvious.
Mr. Sensitive (Squidward Tentacles): Guy Smith from X-Statix. The bummer character/lancer to the upbeat leader.
Shuri (Sandy Cheeks): Enthusiastic, genius inventor from another land.
Nighthawk (Mr. Krabs): Kyle Richmond. Older than the others. The money man. His greed would be for being part of a great superhero team instead of money. Like he usually does, he comes into a superhero team and starts funding it.
I was thinking of, like She-Thing for Pearl, and a few others, so I might come back to this.
I'd actually love to pitch the team to Marvel.