The Nexus brand was always about the pure Android experience with quick updates from Google. When the Samsung Galaxy Nexus made it to Verizon, that Google experience turned to a nightmare for updates. The same phone was only able to get updates whenever Verizon felt like releasing them, so they came with delays. That being said, Verizon's Galaxy Nexus stopped getting updates at Jellybean 4.2.2, meanwhile, the GSM unlocked version of the phone did make it to Jellybean 4.3, the last major update for the Galaxy Nexus (it never made it to KitKat 4.4). A Google spokesperson made a statement...
Source: http://www.gsmarena.com/verizon_to_manage_android_updates_to_its_carrierlocked_pixel_phones-news-20926.php
