Superskrull can't reach the temperatures the Torch can (i think).... even so, Wonderman has a ridiculously high resistance to extreme temperatures
Force bubbles would be annoying..... it's the strength, elasticity and invisibility that're the real problem..... i can't see too many purely physical beings beating the Superskrull because it's hard to hit what you can't see.... and when you do hit him he can absorb the impact with his rubbery body
Wonderman isn't easy to hurt either.... but if the Skrull fights smart he should win this
EDIT: Wonderman can see in infrared..... would that negate the Skrull's invisibility?.... could be an important factor