[BornaE]

These are solid Facts:
As far as FTC goes, the control system is the exact NXT hardware possibly with a different firmware. sensor port 4 of the NXT can do I2C communications and an expansion I/O device will be connected to it.

These are my guesses:

For the Operator Interface, It is possible to use another NXT brick with a custom Firmware to let FIRST manage disabled, autonomous, and teleoperated states.
Or it can be a custom circuit made by FIRST.
As far as managing the game goes, the NXT brick can connect to multiple blue tooth devices, so it can directly connect to the field management system.


I highly doubt that the FRC controller will have anything to do with NXT
I have heard from various credible sources that FIRST is designing the Controller from scratch.
I doubt that the communications will be at 2.4 GHz since a chances of interference would be high, and also Blue tooth is not reliable enough.