Captain America comes from earth and was skinny but was made in a machine to be more stronger. I think that Captain America has no weakness, I reckon that he is strong without and with the shield. Dead Pool's strength is a thing that he has called a Accelerate Healing Factor and without that he can die in one shot of a bullet.
Wolverine has the the same thing as Dead Pool and has a thing called a healing factor, that regenerates damaged or destroyed tissues of his body far beyond the capabilities of an ordinary human. Thor has both a weakness and a strength. His strength is when he has the hammer and without the hammer he is pretty much nothing.
This is my trailer and I hope you like it.