Recent found this clearer picture of the upcoming 2018 Nerf Super Soaker SplashMouth on this website.
From this image and the previous illustration seen, the novelty of this pump-action water blaster is the fact that its reservoir has a top panel that can be opened (by depressing that tab at the back), allowing one to “splash” out its reservoir contents. I really cannot comment on whether this would be a particularly effective water attack unless at really close-range. More info on this water blaster will be posted as it becomes available.
Soak on!