The Darkness vs Thanos

Who wins.

The Darkness

Thanos unless the Darkness has become cosmic or Sky father..

The Darkness may not even effect Thanos. It was portrayed to be ineffectual against the Hulk, and written to actually make him stronger. Wow imagine if the Hulk actually possessed the Darkness powers?

there would be other personified versions of the hulk made up of the darkness... schizo