The Battlefield Blog has more details on the upcoming The Final Stand DLC for Battlefield 4. They also announce testing of the add-on is taking place this week, providing instructions on how to try and get into the Community Test Environment to help, which requires a premium account (inspiring us to repeat our joke that paying to beta test is a grand tradition in the Battlefield series). Here's a Final Stand official reveal trailer and here's an excerpt:

With Final Stand, we knew from the start that we wanted to evolve the Battlefield experience and offer weapons and vehicles that behave differently than anything else on the battlefield. Taking place on the artic landscape of Russia, where the scientists of today are experimenting with technology that will define the battlefields of tomorrow (Battlefield 2142, anyone?), Final Stand will deliver four maps that are unique and distinct. With its military installations set against a wintry landscape, expect intense, infantry-focused combat.

Players will also discover secret prototype weapons and vehicles that further tie into the fiction around Final Stand, and to some extent the Battlefield series. This includes a Battle pick-up rail gun that fires a single round of powerful kinetic energy, and the hover tank prototype, which uses eight experimental jet propulsion engines to nimbly move around the battlefield. We have a few more surprises up our sleeves that we’ll share with you in the weeks ahead.

We definitely had a lot of fun designing these maps and the future-tech weapons and vehicles of Final Stand and hope you guys have as much fun with them as we do. That’s why we want you to start playing them now. Starting today we are going to be testing pre-release versions of the Final Stand maps on the CTE (Community Test Environment).