MCU: 10 Reasons Hulk Deserves Another Solo Film
1. Exploring Professor Hulk
The current situation that Banner is in with Professor Hulk is incredibly interesting as it's a side of him that audiences rarely see. For anyone not interested in comics they likely have never seen it before. Considering this, creating a sequel that actually focuses on Professor Hulk would make for a really unique character study and make for an interesting stand-alone film.
Banner's new lease on life couldn't really be explored all that much due to the fact that Endgame already had a ton of stuff to explore, explain and pay off. But given a second solo film all to himself, and the filmmakers could explore what being Professor Hulk actually means for Banner, especially after the events of Endgame.
His arm looks seriously damaged, Captain America, Iron Man and Black Widow are gone. Thor is off world and it looks like Hawkeye is retired (for now?). But where does this leave The Incredible Hulk? Is he retiring too, or does he still have one last adventure left in him? If he does, fans will be over the moon to see a version of Banner that finally has control of mind and muscle and can save the day on his own.