Just to be original I thought: "Let's get four angry ducks to defend us against this imminent doom." So without further ado, let me introduce you to my team:
The Captain: Deadeye Duck.
You might know Deadeye from the cartoon series Bucky O'Hare, he's a four armed duck, with a happy trigger finger. His most memorable feat is fighting in the Toad Wars. With such battle experience who better to lead the team?
First up: Donald Duck.
Who doesn't know this hot-headed duck? When faced with (what is in his mind) injustice towards him, he gets really angry. So angry I'd dare to say even Hulk would run away scared. So let's hope his anger scares the invaders back to where they came from. But if not....
Secondly: Daffy Duck.
The same as Donald, Daffy can get very angry, but aside from this he's also bonkers as s#!t. So if anger doesn't scare them, maybe angry & crazy will do the trick. Or the invaders might laugh themselves to death, which would also solve our little problem.
And last but not least: Howard the Duck.
Because you don't get any angrier, crazier or more inappropriate than this: He calls you names, beats you up, is probably very drunk and will try to have sex with you. If that doesn't get you running, well at least it might do it for the invaders.
So that's my list, I know they probably don't stand a chance, I just put this here because it seemed like a funny thing. I don't know, you be the judge: Did my picks for the team make you laugh? Let me know in the comments.