WARNING: This article contains spoilers for She-Hulk: Attorney At Law. Read at your own risk.
The finale of She-Hulk: Attorney At Law breaks the fourth wall in the biggest way possible as Jennifer Walters completely and surprisingly, over the conversation, her return in the MCU may have already been teased to be in a movie as KEVIN says, "See you on the big screen."
Jennifer Walters literally took over her show in the finale of She-Hulk: Attorney At Law as she seals a deal with the one that makes all the decisions for the series, KEVIN, a take of the creative team on Kevin Feige, and it seemingly confirmed She-Hulk returning in a movie.
Before Jen goes out as their conversation is about to end, KEVIN, or Knowledge Enhanced Visual Interconnectivity Nexus, said to Jen, "See you on the big screen," and it obviously got Jen's attention so she had to confirm it. Even when KEVIN said, "No," Jen just dismisses it.
Given that this is just the first time Jennifer Walters arrived on the MCU, her stint in She-Hulk: Attorney At Law would definitely be not the last, and having her on the big screen would bring in the question of which movie will she be appearing on.
That being said, even before the start of the series, Mark Ruffalo already teased the She-Hulk's appearance in a movie as in an interview with The Hollywood Reporter, Ruffalo said, referring to Tatiana Maslany, "She’s in now, there’s not going to be another Avengers without her.”
Also, with the arrival of Skaar, the son of Hulk and the reason why he left in Episode 2, it opens to the possibility of Mark Ruffalo's Hulk having his own MCU movie with Planet Hulk or World War Hulk, and that's another film where She-Hulk can make an appearance.
She-Hulk; Attorney At Law is now streaming on Disney Plus.