Entertainment Weekly released their new issue today and a Star Wars Rogue One article headlines their cover. Not only is Darth Vadar going to be making an appearance in the newest movie, but three TIE Strikers are also shown flying over the beach head. MSN's Entertainment Weekly's link states, "The movie will feature never-before-seen vehicles, like the fang-toothed TIE Strikers as well as some sinister new classes of Stormtroopers." I'm sure it's only going be a matter of time until FFG announces the TIE-Striker release.
http://www.guidelive.com/geek/2016/06/22/rogue-one-star-wars-story-darth-vader-ew