It doesn't seem like they'll stop making Fast and Furious any time soon. And yeah, the storyline seems like it was patched together with duct tape just to showcase whatever cars/planes/and now tank they have at their disposal. However, the trailer does look like it'll be fun ride as long as you throw logic out the window.
When legions of monstrous creatures, known as Kaiju, started rising from the sea, a war began that would take millions of lives and consume humanity's resources for years on end. To combat the giant Kaiju, a special type of weapon was devised: massive robots, called Jaegers, which are controlled simultaneously by two pilots whose minds are locked in a neural bridge. But even the Jaegers are proving nearly defenseless in the face of the relentless Kaiju. On the verge of defeat, the forces defending mankind have no choice but to turn to two unlikely heroes--a washed up former pilot (Charlie Hunnam) and an untested trainee (Rinko Kikuchi)--who are teamed to drive a legendary but seemingly obsolete Jaeger from the past. Together, they stand as mankind's last hope against the mounting apocalypse.
The dwarves, along with Bilbo Baggins and Gandalf the Grey, continue their quest to reclaim Erebor, their homeland, from Smaug. Bilbo Baggins is in possession of a mysterious and magical ring.