Earlier today, DICE started to blow the lid off of what we can expect to see in Battlefield 4: Final Stand. In fact, starting today, they're making the Final Stand maps available in the Community Test Environment.

Hell, even beyond that, DICE even mentions Battlefield 2142 in their latest news post about Final Stand.
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).

This is how the map testing on the CTE will work. Starting today, DICE will run servers with one new map per day. Player slots will obviously be limited on those servers, so just because you're in the CTE, it doesn't mean you'll be able to play these maps.

Beyond that, DICE also released the first actual trailer for Final Stand.