The force is strong with this one. Star Wars Battlefront 2 was intended to show officially at Star Wars Celebration in Orlando, Florida April 13-16. However, someone with access to the trailer ahead of time leaked the trailer onto the video hosting service Vimeo, presumably because leaked videos take a bit longer to be taken down on that platform. The original upload is no longer available, but the trailer has since been scattered to the wind and picked up by the larger internet. As of right now, you can view the trailer on numerous YouTube channels, like the one below.
There are a lot of exciting things about this teaser trailer, despite its short length. There are strong hints that this sequel might include space battles - possibly along the same lines as the previous Battlefront 2 on the PlayStation 2, which featured massive ship-to-ship combat combined with ground combat inside those ships.
New hero characters from different eras were also shown fighting in the trailer. Notably the teaser depicts the opening moments of a duel between Darth Maul and Yoda. Rey and Kylo Ren from The Force Awakens also make brief appearances, letting us know that the entire Star Wars universe is fair game to appear in this sequel. That kind of fan service has really been the bread and butter of the Battlefront series.
Battlefront 2 will be releasing with a story campaign, something many players wished to see in its predecessor. The story seems like it will follow a soldier for the Empire in a post-Return of the Jedi galaxy. The second Death Star has been destroyed along with the Emperor and the Rebel Alliance has beaten back the Empire's fleet.
Various locations are shown in the trailer and seem to indicate that battles at Starkiller Base, Jakku, Hoth, and other film locations are in store - no surprises there. The main downside to this leaked trailer is that it gives no context to the systems that will back up these locations. Will Galactic Conquest return? Will bot play help bolster servers that aren't terribly busy? Are the game mode offerings going to be more robust? I suppose we will have to wait to see if the official reveal in the coming days contains more information.