As far as its type goes, I'm going to be bold and suggest that they introduce a new type: the Light type. For me, it'd be far more interesting than just having the new Eeveelution be one of the existing types. Plus, this may sound silly, but it's position between Jolteon and Flareon looks a bit suspect to me, since both can emit light in a way.
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What I find more suspicious is the empty room upstairs. If it were Umbreon's room, why would it be outside watching the moon? For that matter, the light penetrating the window looks too bright to be moonlight.
I guess that I may as well mention this rumor. I don't believe it mainly because it stipulates that Generation VI isn't due to be released next year, but the source has some reliability, so it is worth mentioning:
– Mainline 3DS Pokemon game needs roughly two more years before it’s released. Uses a full 3D engine and will have a story dealing with a world wide crisis. A new Pokemon type will be introduced (has not been done since Gold and Silver) and while not as many new Pokemon as in past gens older Pokemon will get new abilities and forms. Will maximize the Nintendo 3DS use of 3D, StreetPass and online connectivity. The first NFC game for Wii U will be a next gen Battrio game coming out in all regions.
That rumour is mainly about E3 and there is never Pokemon stuff at E3 besides maybe a smaller side game, last year being Pokedex 3D