Motorola publishes their estimated upgrade dates here
. The Flipside is not even listed as being in progress.
There is a stock rom available here
that you can flash with RSD Lite to return your phone to stock.
Never ask before searching!
Current Devices: Original Moto X GSM Dev Edition, LG Gpad 8.3, LG GPad 7.0 LTE
Retired Devices: AT&T LG Optimus G, At&T Galaxy Skyrocket, Vizio VTAB1008, Dell Venue, Dell Streak, Moto Flipside, Moto Backflip, Samsung Eternity