I am not trying to say I have faith in the rumors about the 1820. But what I do know is MWC is right around the corner. I don't see any reason at the moment to get a 929 if it is released, until I have a chance to see what is made known at MWC. Verizon at this point is screwing up. The longer they wait to release the 929 with MWC around the corner and new generation phones getting ready to be released by Samsung and Apple is only going to hurt 929
Sales.
But at the end of the day Verizon doesn't really care. To Verizon, their bread & butter are the Google (Samsung, HTC, Moto) and Apple phones. Since WP has such a small market share Verizon probably isn't all too worried about how many they sell. People who want to buy them will still buy them.
People will still buy the 929. If/when they announce a new phone, which will likely launch 2-3 months after the announcement, people will buy that one too. Verizon will make a case for existing customers to join the Edge program and trade in their phones for the newer device.
I also wouldn't be surprised if we find out the 1820 is real and that it has a 6inch 2K display to compete with the Note phones and continue to push the 929 as the 5inch.