Marvel fans think an Avengers: Doomsday billboard spoils a major Thor plot twist

A billboard for *Avengers: Doomsday* has prompted speculation that Thor may use the Odinforce, after showing him with yellow lightning instead of his usual blue. The powerful ability could make him exceptionally formidable, so fans have wondered whether the image gives away a plot twist.

The billboard was spotted in Shanghai, but the film’s trailers have so far shown Thor using blue lightning. Yellow lightning has also appeared on a film poster and an action figure, suggesting it may not be a major reveal. The film is due in UK cinemas on 16 December and in the US on 18 December.