People are talking about the Falmer, the Snow Elves, and the Snow Prince as if they're all separate races of Mer... such is not so.
The Falmer are the Snow elves, and the Snow Prince is a Falmer. Just like all of the High Elves are Altmer, and all of the Dark Elves are Dunmer; all of the Snow Elves are Falmer.
Here, follow this link. http://elderscrolls.wikia.com/wiki/Falmer
It explains that the Falmer were once a very proud, noble, powerful race of Mer like the Altmer, whose lands stretched from all of Skyrim to include the Island of Solstheim. They had pure white skin, and a slight covering of frost over that. The Falmer once controlled all of the lands consisting of Skyrim and the Island of Solstheim. Their southern border was made by the border with the Ayleid Empire, and southeastern by the Dwemer lands.
The Snow Elves are the Falmer, and the Snow Prince (the greatest of all Falmer) fell and was buried on the island of Solstheim where his tomb still stands today.
Whether or not the DLC has the Falmer reverting back to their pre-Dwemer-enslavement-blinding days, whether they become a playable Race of Mer or still stay enemies, doesn't matter.
I just wanted the misconception that the Snow Elves and the Falmer are two different races to cease. lol