Cosmic cube red skull was more powerful than korvac disguised as a watcher.
He kept obliterating all opposition with a thought.
He rewrote time over and over....
That red skull? Unless thanks got a severe upgrade against time/reality manipulation... He's done for.
__________________ Quotes from Hia8:
"I claimed that the science is sometimes faulty."
"You don't understand. This is fiction. That means none of this stuff really happened."
"There is no writer to purposely ignore a character's natural ability just because it suits the story."
"in some cases because the writer knows that Character A will dominate Character B easily and refuses to allow this to happen for the sake of the story."
Red Skull had merged with a charged Cosmic Cube. He was warping the planet, took over Earth and ripped Korvac's atoms apart. He takes down Thanos something fierce. Thanos might have a Cap jobber aura moment as the underdog, maybe. But it's a slim chance.
Red Skull 9/10.
Then Captain America beats them both with antimatter.