I voted for Snow Warning this time, because Ice Shell has a nice lead and looks like it will make the final two. Snow Warning makes a ton of sense, and would give Hail teams a legitimate option over Abomasnow.
As the originator of the original Mountaineer ability suggestion, I support the changing of the name of Ice Shell. My original Mountaineer suggestion was to make it immune to Rock. This is now a lesser form of the immunity. I like it.
I'm skeptical that this Pokemon has a prayer of making its way into the actual game. Pokemon is a billion-dollar franchise for Nintendo. It's one of the biggest game/entertainment brands in the world. There are dozens of online Pokemon fan sites, and many of them have created new pokemon. Heck, they've created entire custom games, complete with full pokedexes. This is great for the fans, but I doubt Nintendo notices this stuff at all. They have much bigger issues with making millions from games, movies, and merchandise. The likelihood that this pokemon, being created over here at Smogon, will be noticed by the Nintendo Pokemon behemoth -- is a longshot of monumental proportions.
But, I guess it doesn't hurt to hope...