https://news.yahoo.com/flash-fans-want-grant-gustin-214846473.html

After Miller was recently arrested for disorderly content and harassment, Warner Bros. is scrambling to figure out what to do with Miller’s role as The Flash in DC films. So fans of The CW's The Flash are pushing for Gustin to take over the big-screen role.

Not knocking that Grant Gustin is a "TV actor" I wouldn't mind seeing him as a replacement it would be a slap in the face to fans if WB goes with some random Joe Nobody in the role.