Where is this assumption that Wave 7 is going to be Episode 7 stuff coming from, or that we're going to get new trilogy stuff in X-wing at all? Lets put aside whether the new movies take place in the Galactic Civil War era it's been stated firmly X-wing is to be set in, look at the pool of ships we have now. 8 of 21 standard format ships(HWK, E-wing, Defender, Phantom, Decimator, Star Viper, Aggressor, Syck) are Legends content, and a 9th, the YT-2400, is only canon via a several second cameo in the Special Editions of Episode IV. How many of the pilots and crew are likewise at this point? Corran, Isaard, Mara Jade, Ibtisam, Horton Salm, Soontir and all of the TIE Interceptor pilots...the list goes on and on.
Obviously FFG is going to be releasing Episode VII related stuff, but I don't know that there's any guarantee we'll be seeing Episode VII in X-wing at all. The E-wing is already a bit of a stretch on the time frame, and then you start getting into all sorts of alternate timeline weirdness. But hey, I could be entirely wrong. At the very least though I highly doubt we're not seeing anything on Wave 7 because it's tied to Episode VII, if only because I strongly doubt we'll be seeing zero releases post-Raider for FFG's best selling product line until December when we've already been told Wave 7 is in the can and Wave 8 is in testing.
Edited by Otacon