I really think instead of texturized material they went with something smooth and sleek. Yellow for flashes boots would be better. Plus hands need to blend color wise. Costume should be a richer red. In my opinion I'd like to see a silicone body dyed red that way body and hands will match seamlessly. As for green lantern his traditional color block suit is preferred not a hybrid movie comic because this is not edgy or cool at all it's a huge mistake and sales will reflect that. For starters boots are not matching at all. 2 that textured suit doesn't go with him either fabric should be smooth and matte. If they stick to the color scheme everyone is use to and proper material these could work.
The reason for a silicone body for The Flash is simple. This suit is continuous and anything like there proto there will be a disconnect instead of continuity. The body can be sculpted with finite detail and molded it can work like cm toys or Keaton design but with sideshow sculpting signature. It would be vastly improved. It may be hard for people on board to see what I mean but sideshow should do one and get some reactions I think a cloth costume is hurting flash.