Go for it bro, I got two rMPB 13 for me and my girlfriend today. Gonna return it even if I hear about the invites. If I like it, I would probably use these for a while.I was at an Apple Store recently and talking to some of the employees and they said they can't wait for Apple to release the New MacBook Pros either.
I'm not going to do it but that buy a 2015 MBP and use it for a couple weeks and then return it when the new ones come it, It is tempting.....lol