Iris’s current portrayal on The CW’s The Flash (played by Candice Patton) is a bit different from the comic books, and there is no way to tell what her role will be in The Flash movie as of yet.
We will soon be graced with The Scarlet Speedster’s presence once again in the upcoming Justice League movie, where he will be recruited by Batman (his mentor).
In June of this year, The Flash movie recruited a new director after previous director Seth Grahame-Smith (screenwriter of Abraham Lincoln: Vampire Hunter) dropped out due to creative differences.
In the comics, West is also the proud aunt of Kid Flash a.k.a Wally West, and grandmother of the 4th Flash, Bart Allen.