This is gonna be an interesting topic that came to my mind cause I was in the middle of rewatching the first X-Men movie and I caught on to something I didn't really catch onto until now. So as many of you may remember if you've seen X-men, you get the sense of notion that Magneto was after Wolverine until you get to the train sequence where Magneto was like "Whoever said I was after you." and quickly looked directly at Rogue. And there is a key scene between Iceman (actually Mystique) and Rogue about using abilities which causes her to leave the mansion and head to the train station. This, I believe is a great way of misleading the fans from Bryan Singer's part unlike with how the "red herring" bs that Kishi claimed towards NS.
So I'm curious what red herrings have you guys seen that were done properly whether in a show, book, movie, video game, etc?