Black Widow vs Scarlett Witch though. Like Wanda wants to learn how to fight without her magic and asks Natasha for help. In no time they wear form-fitting body-revealing clothing and are all sweaty and full of adrenaline in a tight embrace.
Bring in Florence Pugh, Hailee Steinfeld, Natalie Portman, and Kat Dennings for the sequel. Involve the rest of the Marvel Universe as you see fit. Dc universe too if desired.