This could best be accomplished by bringing back one of The Incredible Hulk’s main players, and no, another Thaddeus Ross appearance doesn’t count.
Abomination was imprisoned at the end of The Incredible Hulk, so maybe he’s managed to escape in the aftermath of Avengers: Infinity War and is causing trouble.
The last time we saw Samuel Sterns, his open head wound had been infected by Bruce Banner’s blood, foreshadowing his transformation into The Leader.
But perhaps the best course of action is to finally reunite Banner with Betty Ross, who, as far as we know, has seen him once over the last decade.