Looking at the Eevee graph from the pokemon website makes me know for a fact that Slyveon is in fact the new flying Eeveelution. seeing how the graph states to "Look closely" on how it is set up, does provide a significant amount of evidence that Slyveon is Flying Type. If this is I deed correct, the the person who posted the rumor about it, located on the rumor thread ( I believe the one labeled rumor #2), could be true, but we will have to wait until March, or mid-March, because that is probably the time the type will be revealed.
I do want another Eeveelution, but I am now having my doubts, but we would have to wait and see because of the Eevee short movie. I am desperately hoping though that if a new Eeveelution does come out besides Slyveon is Fightning. Why the second Eeveelutin of Gen VI, if it does come out, would be Fighting type is because of this: in every Generation the Eeveelutions have appeared, out of the two or three, o e has an advantage over the other. In Gen I Vaporeon is weak to Jokteon, Flareon is weak to Vaporeon. In Gen II Espeon is weak to Umbreon. In Gen IV Leafeon is weak to Glaceon. So it would make sense for a new second Eeveelution to be Fightning or Rock because Slyveon would be strong against Fightning and weak to Rock, if indeed it is Flying