Spider-Man: Far From Home isn't just giving us our first glimpse of a post-Endgame MCU, it's also debuting one of the most enduring Spider-Man villains of them all - Mysterio. Based on the trailers, it's hard to say whether Jake Gyllenhaal's Mysterio is friend or foe, but anyone who knows Mysterio from the comics is well aware he's not someone to be trusted. If you need to bone up on your Mysterio knowledge before Far From Home hits theaters, we're here to help.