While Marvel has pretty much laid out their plans for Phase 4, some other shows and films have been announced for what we assume is Phase 5. We know that a She-Hulk series is coming to Disney+, and Mark Ruffalo has confirmed that he could be involved.
Talking to People, Ruffalo has confirmed he’s going to meet with studio head Kevin Feihe about an appearance. He says, "I don’t know, I’m supposed to go meet with great Mr. Feige… Great mysterious Mr. Feige to see if there’s someplace."
With Hulk being an important part of She-Hulk’s origin, it would make sense that he would be part of the series. While I would settle for a small cameo near the end, I would prefer Ruffalo got something close to a recurring role. After all, Professor Hulk is kind of taking a leaf from She-Hulk in the comics, in a sense that he’s Hulk 24/7.
Besides, if Jennifer Walters is a lawyer, maybe it could also be a good chance to re-introduce Matt Murdock/Daredevil into the MCU?
For now, we don’t have any official updates on She-Hulk’s plot yet. We do know that Marvel Studios is already casting the lead role, and they’ve hired Rick and Morty’s Jessica Gao to be the showrunner. Besides that, we have no idea when the story takes place, or how Hulk will factor into the origin. In the comics, Jennifer receives a blood transfusion which gives her powers, but it’s likely Marvel Studios could change it for their series.
No release date has been set for She-Hulk, but the first Marvel series, The Falcon and The Winter Soldier, comes to Disney+ in the fall of 2020.