No mercy, A child of war.

3 years after endgame a Hydra assassin Is sent to kill The Avengers, Hydra Has been hiding in the shadows Waiting for their time to strike, slowly gaining power. The only thing standing in their way is The Avengers, But will the Assassin succeed in her mission? Will Hydra Finally be able to take over? or, Will she fail?

"Sometimes It's best, to let those we love go. Not for our Sake, but for theirs."

"But it's not fair to you."

"Fair to me? There's been a lot of things that have not been fair to me in this life, But I have been dealt my cards, and now I must play them."

PS. Natasha is still alive, When Bruce Snapped he wished for Natasha to come back.
Tony is still alive as well, Carol snapped instead of him and absorbed the energy of the gauntlet,
Wandavision never happened because Wanda had Natasha to help.
Steve never went back in time to be with Peggy, He stayed in present day and got back together with Sharon Carter.
And Clint still Matt Kate.