EA does not provide early access to Star Wars Jedi: Fallen orders because of the fear of spoilers, but it did not make a difference – Dataminer still managed to rummage around in the game files and discover a lot, including some story Spoilers, so if you want to come in fresh, turn back now!
Collected on Reddit by TheMastersSkywalker, the leaks contain a video showing Cal's combat skills and powers of power, some of which we've seen before. You can see a list of Cal's moves, from jumps and evasive maneuvers to distracting blaster blasts. He can also get his hands on a Dual Blade Lightsaber that he will be able to switch to the mid-combo.
On his galactic journey Cal Bogano, Zeffo, Kashyyyk, Dathomir will visit a combat club on Umbara and the inquisitorial fortress in Ilum. While you can explore the planet in most levels, Umbara and Ilum are the exceptions. Bogano and Zeffo were made specifically for the game, but the rest of the planets have appeared before.
Kashyyyk is of course the home of the Wookies; Dathomir is the place where both Darth Maul and Asaj Ventress come from, as well as Rancors. Umbara is a sunless world that had previously appeared in the Clone Wars. and finally there is Ilum, a frosty world full of lightsaber crystals.
It looks like Darth Vader is coming over to say hello. You can see the files of the Great Evil Sith Lord here. It's no surprise that Darth Vader has an interest in one of the last Jedi, and one of the trailers can hear him breathing, but apart from that joke, Respawn kept his looks a secret.
Star Wars Jedi: Fallen Order is due on November 15th, but more details will likely be announced before this date.