They pretty much confirm generation 7, as expected. Now if only they would also somehow show a relation to the "Z-hype" to confirm that they're at the same time still tying up the plot from XY and Zygarde...
Well, they do, indirectly. The actual logos just so happen to be light blue and orange, the "other two" colours on Perfect Zygardes chest.
(also, remember that pink crystal SUNdial from Anistar seen in front of Zygarde on this poster? as well as an NPC mentioning a moondial..)
Also, what happens when the sun and moon get to close in the sky? Eclipses. Seems fitting for that giant black mecha-kaiju I'd say.
THE HYPE TRAIN IS REACHING FULL SPEED.