J'onn J'onzz vs Venom
J'onn J'onzz, The Martian Manhunter, versus The Lethal Protector, Venom.
This would be a great fight, but J'onn got this. I don't think Venom has the resistance to withstand a mental attack from someone as powerful as J'onn. Also it would be intense if a symbiote somehow manages to take control over the Martian. Can you imagine how powerful and insane as Symbiote-controlled Martian Manhunter would be?