How bout this for a guess...
The quad core Motorola Targa may potentially be the next in the Nexus line and be a "Pure Google Experience". The first Nexus was HTC (unlocked from a carrier with a January release), the S Samsung (T-mobile with a mid December release), and potentially the next iteration would be for Motorola to build as it seems to be the thing with the Nexus line, rotating manufacturers. The next big thing may be releasing the Targa on with Verizon service as Google appears to be rotating carriers of the nexus as well. So Verizon users could get the freedom of "Pure Google Experience" from one of the most restrictive manufacturer Motorola on one of the most restrictive carriers Verizon.
Disclaimer... I use Verizon so are they restrictive, I guess.
Disclaimer... I'm full of BS and really don't know much of nothing, just making a guess. Please don't round up a posse if I'm way off here.