I personally think we will not see any 3G CDMA-only (non-4G LTE) devices on Verizon after the first half of 2012. Since September 2011 (or more specifically when the Motorola Droid Bionic was released), Verizon has released six 4G LTE devices (with two more coming soon in the RAZR Maxx and Droid 4) and only four non-4G LTE devices (or five if you count the 8 GB iPhone 4 as a "new" device or separate from the iPhone 4S):
Verizon 4G LTE devices, early September 2011 to mid-January 2012:
*Motorola Droid Bionic
*Pantech Breakout
*Samsung Stratosphere
*HTC Rezound
*Motorola Droid RAZR
*Samsung Galaxy Nexus
Verizon 3G CDMA-only devices, early September 2011 to mid-January 2012:
*LG Enlighten
*HTC Rhyme
*Apple iPhone 4S
*Samsung Illusion
Verizon has clearly moved from 4G LTE devices being unique, high-end releases (as was the case with the HTC Thunderbolt, Samsung Droid Charge, and LG Revolution in the first half of 2011) to being "core" releases. Though Verizon isn't done with releasing new 3G CDMA-only phones yet, considering they intend to have their entire network covered with 4G LTE by the end of 2013, it would make zero sense for them to sell new non-4G LTE devices in the second half of 2012, or especially in the pre-holiday rush to market phone spree that starts in the September/October time frame every year.