There have been numerous discussions around a "Flagship" radio probably in the realm of a 14ch high end radio, and it's been somewhat assumptive that there will eventually be one, however all the current design has been toward rebuilding the core radio line up and servo line up,
If you look at what has come out of ATX in the last 2 years, they're clearly making an extremely aggressive effort to up the game. JUST on the aircraft side, the SD5, SD6, SD10, 5 new Rx's (5,6,7 and 10 channel and Micro 6) and about 20 new servos all in the last 24 months.
My understanding is that they've been equally aggressive with their surface line up of radios too. Let's hope that pace continues... If it does I think the high end radio is definitely on the list.
BTW, I'm a team flyer, so I have a lot of conversations with the folks at ATX, but no official word on ...well...anything.
Hopefully Mike jumps in here with a more official rumor.