Motorola has announced that it will not be bringing Lollipop to the Droid Ultra, Maxx, and Mini as they originally intended. This will leave the three phones, originally introduced in July 2013 at Android 4.4 KitKat. The announcement was made on Motorola's forums, where the company also apologized for the lack of an upgrade.
From Motorola:
We apologize that we will not be upgrading DROID Ultra/Mini/Maxx to Android Lollipop, as we had hoped. We know how important software upgrades are to our customers, and we're very sorry that we are unable to provide the upgrade.
As part of its apology, Motorola is offering discounted pricing on two of its newer phones, the Droid Turbo 2 and Droid Maxx 2. Both devices were unveiled in October 2015, and both run Android 5.1.1 Lollipop. You can sign up to get $100 the Turbo 2, bringing its price down to $524, and $50 off the Maxx 2, bringing its price down to $334.
Source: Motorola
