verizon has commited their newly acquired 700 MHz spectrum to LTE. I cannot find anything from verizon about their plans for AWS... All I could find was speculation, I believe that they have to tell the FCC what their plans are before the licenses are actually transfered to them, but I just can't find it.
That said, if Verizon does plan to use it for CDMA, they are not nearly as pressured to launch it as a company like Cricket or Metro is. Cricket and Metro need new spectrum to launch in more places, Verizon merely complimented their existing spectrum. I believe that the new spectrum holders are responsible for helping to clear the spectrum so Verizon may be taking its time to reduce costs.
US Cellular is likely to launch CDMA AWS before Verizon does, and thus we may see some flashable devices out of them long before Verizon even has a network close to running on AWS banRAB.