Who would be the main antagonist in a 'The Punisher and Black Widow' fanfiction?

A possible main antagonist could be a new character created specifically for this fanfiction. A scientist who has somehow managed to combine Greek magic with Hydra technology. This character could be creating powerful hybrid creatures that are causing havoc in both Percy's world and the Marvel universe. Percy and Black Widow would need to put aside their differences and work together to stop this mad scientist.

Ares could be a great antagonist. He might see the union of Black Widow and Wonder Woman as a threat to his plans of chaos and war. His god - like powers would pose a significant challenge to the two heroines.

One key element is the contrast between their personalities. The Punisher is more of a lone - wolf vigilante with a very direct and brutal approach to justice, while Black Widow has a more complex past with espionage and a different set of skills. Their coming together often creates a lot of tension and interesting interactions.

One common theme is the unlikely partnership between them. Given their different backgrounds and methods, seeing how they team up and work together is popular. Another is redemption, especially for Punisher as he's often seen as a very violent character, and how Black Widow might influence that.

A good antagonist could be a rogue S.H.I.E.L.D. agent who has his own plans for power. He might see Captasha and Black Widow as threats to his scheme. This agent could have access to some high - tech weapons and a group of loyal but misled followers.

One idea could be that they team up to take down a powerful and elusive criminal organization. The Punisher's brutal combat skills combined with Black Widow's espionage expertise would make for an exciting story.

One great Punisher and Black Widow fanfiction is 'The Unlikely Alliance'. It shows how they team up to take on a common enemy in a gritty underworld setting. The story does a great job of capturing the essence of both characters.

It could be someone who wants to steal the knowledge Naruto gained from the Black Panther. Maybe a rogue ninja or a power - hungry villain from another land.

Another possibility is that in the world where Goku Black comes from, there is an enemy who follows Goku Black to Izuku's world. This enemy could be a powerful Saiyan or a being with a dark ki similar to Goku Black. They might see Izuku as a weakness in Goku Black's plan and try to eliminate him first, making them the main antagonist in the fanfiction.

Baron Zemo could be a great main villain. He could be plotting to create chaos between the two heroes. He might use his intelligence to set up situations where Captain America and Black Widow suspect each other, all while he is working on a larger scheme to take over a powerful weapon or organization.