I'm a bit out of the loop, but my favorite part of B/W prerelease was the naming of the new Pokemon not yet revealed in the US by the fans. This started with Wotter, Smugleaf and Pignite and some of my favorites were Afrodeo and Sarcophaghost, both of which I feel are better names than the ones we ended up with (Bouffalant and Cofagrigus).

However, I haven't seen any such thing for the new Pokemon that were found in the datamine, with the sole exception of Rowlet's evolution, who is called Robinhoot or some variant on that by most everyone.

Pic related - what the fuck are we calling this thing?