A leaked list from the closed Alpha of Star Wars Battlefront 2 has uncovered the current list of heroes available in the game, and the list is quite impressive...take a look:
Notably missing from that list is Finn, who was teased earlier this year by EA as DLC to be added at a later date. What's weird is that Finn and Phasma were originally announced to be released at the same time, so it's weird her information is in there and not his. New characters added from the previous game include Yoda, sequel era Rey and Kylo Ren, Darth Maul, and General Grievous. There's also Iden, who is a unique character to the game and new to the Star Wars Universe.
The list looks good so far, and I can confirm the game has changed a lot for the better when we played it at E3 to the point that I'm not even worried about people pre-ordering. Be ready to play it November 17th.