Really? A solo hawkeye movie or a solo hulk movie would be good. But, what I want to see is they bring back the fantastic four. Honeztly since stan lee died they Maarvel studios should do a fantastic four movie but do it right.
The only thing you need to do is simply go for the head. Cut his head off, or stab him with the muramasa blade, which no healing factor can fight against. I believe ghost rider can incapacitate him but not kill him