I don't think I've answered this topic yet, guess I'll do it now.
Are there any current Water type Pokemon you'd see likely to gain a new stage in their line in the future generations? If not, are there any you'd like to get one? New stage counts for both pre-evolutions and evolutions.
I would like to see Lapras get a baby evolution some time in the future, it could be all cute and fun to use in battle and I love cute Pokemon.
Golduck should also get a new evolution, and maybe give it awesome stats so that I can finally see it viable to use on a team and Psyduck was one of my fave Gen 1 Water-types.