From VancouverFilm.Net, take a look @ more footage, plus images from "The Flash" episode "The Once and Future Flash", written by Carina Adly MacKenzie and directed by Tom Cavanagh, airing April 25, 2017 on The CW:
"...'Barry' (Grant Gustin) travels to the future to find out the indentity of 'Savitar' in the hopes of saving 'Iris' (Candice Patton). Upon his arrival in the year 2024, Barry encounters future versions of his 'Team Flash' friends, who, following the death of Iris, have become very different people, profoundly impacted by their showdown with Savitar.
"It will be up to Barry to infuse a sense of hope back into the team, as he proves to be the hero his future friends have been waiting for. Meanwhile, back in 2017, the hunt for 'Killer Frost' (Danielle Panabaker) continues..."
Click the images to enlarge and Sneak Peek "The Flash: The Once and Future Flash"...