So far all the new eeveelutions have come in pairs. Both times have had a type power play with Dark over Psychic and Ice over grass.
We've only had one announced Eeveelution, Sylveon, a fairy type, so far.
This is the perfect chance to introduce a Dragon eeveelution and I just hope they've kept it under wraps as to not steal attention from Sylveon, and the new Fairy type's spotlight. --- The One4U Alliance - Support gaming! End console wars!
You know what would be awesome? If it was never announced, and you had to find out how to get it in game, without knowing it exists.
I love this idea, but unfortunately, it's just improbable and fairly worthless now. The information would be leaked to the internet within days of the release because people would hack the game and figure out the entirety of its contents and spread quickly, and if you just so happen to be on the internet or these forums the news would get to you instantly, which would ruin the surprise --- Aut viam inveniam, aut faciam.