If the penance stare works, its over in 2 seconds.
If not, the psionic nature of the hellfire would be enough to incapacitate hulk long enough for it to be considered a win.
What is hulk going to do against the living imbodiment of gods vengence and rightgeous anger? punch it? ha!
Hulk would hope he never did anything even remotely evil, cuz his ass would be toast.
GR sent Galactus running once(which would bring me to conclude GRs PS would work on hulk, cuz in essence Galactus is innocent as well).
Anyone who can verify this is greatly appreciated.
Does GR's PS work on anyone who's ever caused another pain?
I'm pretty sure you are, in the cartoon they can't do anything to Galactus, and then for no reason what so ever Ghost Rider comes flying on his bike straight past Galactus' head, gives him the penance stare, and without a word rides off again. And I'm pretty damn sure Galactus and Ghost Rider have never met in comics.