retell the story of Galactus and how the Watcher came to warn them

They'd just make the Watcher female in that story.

"All the male Watchers don't want to interfere, but me, a strong and independent thinking Watcheress shall warn you!"

Or make him black and do the whole "magic negro" thing that's also been done over and over like in The Adjustment Bureau when the only "angel" that helps is Anthony Mackie.