Iris remains alive in the Flash comics. The creators have kept her as an important and ongoing presence, and her role continues to evolve and contribute to the overall narrative.
Obviously, Iris and the Flash are the main characters. Iris is the one who is pregnant, and the Flash is her partner, so they will be at the center of the story.
Well, one possible plot could be that Iris discovers she's pregnant right when a new villain emerges in Central City. The Flash would then have to balance protecting the city and taking care of his pregnant wife. He might be extra cautious in his battles to avoid any harm coming to his unborn child.
Yes, there might be some fanfiction out there with this plot. Fanfiction writers often explore different scenarios for their favorite characters, and a story about The Flash and Iris having a baby can be an interesting concept for many fans to write about.