1. His name's Phastos
You've never heard of him. He's an Eternal — one of a band of super-powered immortal beings who have lived among us for over 7,000 years, tasked with protecting humanity from their evil counterparts, the Deviants.
No, he's not exactly a household name. Neither, for that matter, are any of the Eternals, which you might think would have Marvel worried. But it's not the first time they've sunk a lot of money and marketing into a film starring deep, deep-bench Marvel characters/raccoons/barely-talking plant creatures.