9. Black Widow
Black Widow is essentially Ronda Rousey on Super Soldier Serum – you know, minus the serum. However, considering she’s one of only two non-metahumans on this list, she would likely be one of the few that the man Brock Lesnar would have a chance against in a fight. Even if the betting odds in the Palace of Wisdom have Natasha as a heavy favorite.
The character of BARAKLEZNAR, though? That’s basically Hulk-in-the-Helicarrier.