Modern Star Wars often goes deep into the Lucasfilm archives for inspiration. It’s not unusual these days to see a character from the old Expanded Universe become canon.

The Sentry began his comic book existence as an elaborate trolling by Marvel Comics editorial. Back in the ’90s, the Marvel Knights line of comics helped save the company after bankruptcy.

Seen in the newly released footage as a shadowy form like a silhouette of a caped man, the figure floats like Superman and ...