Robert Downey Jr. is officially returning to the Marvel Cinematic Universe. But this time, he’s not flying in as Iron Man.

Ironheart introduces a surprise Iron Man villain in its first three episodes, but there's a big catch. Here's what you need to know.

A new featurette possibly hints at the arrival of a secret villain in Marvel’s upcoming Ironheart series. Known for his ties to Iron Man and mastery of advanced tech, the character may serve as ...