All this being said, the best way for Red Hulk to be featured is as the main antagonist in another Hulk movie, but that’s not going to happen due to the previously-mentioned film rights issues.
However, since She-Hulk Season 1 already has Abomination and Titania on deck (my fingers are crossed for The Leader to also appear), Red Hulk would likely need to be saved for Season 2, assuming She-Hulk doesn’t end up being a limited series like WandaVision and The Falcon and the Winter Soldier.
So unless Ross could wreak havoc as Red Hulk in something like Avengers 5, the only other logical platform for the character is She-Hulk, as that Disney+ series serves as a loophole to more deeply exploring the Hulk mythos within the MCU without causing problems with Universal.