Who Is Uatu, the Mysterious Watcher of Marvel's WHAT IF? - Nerdist

Watchers (ancient, alien race dedicated to watching other worlds)

Watcher (Character) - Comic Vine

The Watcher is seen in GoTG2 post credits scene. Theories as to what they actually are? (Also this potentially shows that Stan Lee may have had the plan for having The Watcher

How Strong Is Uatu? Marvel What If? Shows off the Watcher's Strength

Uatu the Watcher - Marvel Snap Cards - Out of Games

Uatu the Watcher, Characters

What If: 10 Things Only Comic Book Fans Know About The Watcher

Uatu The Watcher – Near Complete Set

The MCU's Watcher Set to Make His Next Move in a Most Unexpected Place - Murphy's Multiverse

The Watcher Canvas Print – Marvel What If . . . ? – Customized