It's already plug and play for batch fire Lightnings, or Mustang ECU/A9L swapped Lightnings, you just need a separate trans controller.
CAN protocol is essentially universal so as long as Quick 4 utilizes standard CAN protocol then they should be able to communicate with each other when they add CAN to their device. Regardless, the prototype boards for the PiMPx/PiMPxs ECU's with trans control built-in are being assembled right now so once those are ready, we'll install it in a few E4OD equipped vehicles to finalize the design, develop base tunes for the trans, etc., and then we'll be ready to release an ECU/trans control all-in-one unit. Obviously the price will be higher than the ECU by itself but it won't be more than the ECU + Quick 4 & Harness currently is.