We first met Valentina Allegra de Fontaine in The Falcon and The Winter Soldier after she recruited John Walker and turned the former Captain America into her U.S. Agent. She'd later appear in Black Widow's post-credits scene, sending Yelena Belova after Clint Barton (claiming that Hawkeye was responsible for Natasha's demise).
Many fans are convinced that "Val" is assembling a team of Dark Avengers, though it's clear Marvel Studios is taking the same slow-burn approach to this character as they did with Nick Fury.
Now, a newly surfaced set photo has started doing the rounds online which claims to reveal where we'll next see the mysterious villain make her presence felt. It appears Louis-Dreyfus has been shooting scenes for Black Panther: Wakanda Forever, though we can only speculate as to what she might be up to.
Another less likely possibility is that she was on hand for Hawkeye's reshoots, but with so many Marvel Studios movies and TV shows in various stages of production, it's difficult to be sure.
Whatever the case may be, Val is a character who looks set to be a big part of future stories. We're sure Namor or Riri Williams would both be candidates for her team of Avengers, though it's also possible she's looking to interfere in whatever has been happening in Wakanda since T'Challa's death (assuming that's how Marvel Studios chooses to write the character out of the MCU).
Check out the photo below: