We are supposed to get Lollipop after the G3. Unfortunately, there's issues with it on the overseas models that have been released, so until they fix that, we aren't going to see it. I'm thinking spring/summer time frame myself for the G2. Unfortunately, Sprint likes to hold updates like these to force new phone sales. I would suggest finding some G2 forums because they'll have any new information first.
I understand that you have to test it out but you do have past history of holding updates that work fine on other carriers. And don't tell me to check the Newsroom, that's the last place to get the information.
I got 2 major issues on my lg g2，first it was that "data connection" problem then it all came down to what, that i dnt have sprint zone on my device. I donno how to solve data connection issue and keep update my device without sprintzone very much frustrated..