Who is Mysterio, the guy in the fish bowl helmet in 'Spider-Man: Far From Home'?

Mysterio is one of the most awkward rogues Spider-Man has faced throughout his history. - Photo: Marvel Comics

Having already fought Doc Octopus, Sandman, Venom, Electro, Vulture, Lizard and two Green Goblins, the latest Spider-Man movie (Spider-Man: Far From Home) welcomes a new addition to the web-slinger’s movie rogues gallery – Mysterio!

But is he friend or foe? The trailers have not been clear on that part, so there is a remote possibility that this version of Mysterio might be a hero ... but his comic roots state otherwise.