From all the rumors, just hold out until September 4th, then you will know about compatibility.
Well we all know that a new core set thanks to all the leaks is out. It would be stupid for it not to be compatible. That being the case it might be a good idea to wait for September 4th and see when the new core set comes out.
After that if you want to get into X-wing now a classic core set might not be a bad thing and should still suit you. If you want to wait till the new core set in wave 9 or whenever that's just fine and you should be good doing that.
Edited by Marinealver