>>20701101Official Timeline says B2/W2 is happening vaguely around the same time as X/Y, sort of like Platinum was to HG/SS.
Characters made cameo's between those games, and Jasmine even has a small little sub-plot about Pokémon Contests.
The confirmation of the timeline + Parfume Palace, should be enough hints. Z will somewhat continue the Unova story.
HOWEVER, because of the lack of Memory Link between the Gens, Hilda/Hilbert themselves probably won't show up. PROBABLY. Instead, N will probably make an appearance, and talk about "a great friend" or something, referencing what has happened to them since.
Oh, and if GF don't suck cocks, they could totally include the Pokémon World Tournament too.
>tfw more excited for the possibilities of Z, than I am for OR/AS 