Sora is part of the game's second Fighters Pass, which includes Arms' Min Min, Minecraft's Steve & Alex, Final Fantasy VII's Sephiroth, Xenoblade Chronicles 2's Pyra & Mythra, and Tekken's Kazuya Mishima. The Fighters Pass cost US$29.99 and it includes six different characters. You can also purchase each brand new individual character for US$5.99. Aside from the new character, the DLC will also include additional music and a brand new stage. Sora will be available in the game starting this October 18th.
Lastly, with this being the final Super Smash Bros. Ultimate presentation, the game is confirmed to have a total of 89 fighters, 340 different stages, 201 items, over 1,100 kinds of songs, over 1,400 Spirits, over 450 different games featured, over 2,200 characters featured, and 140 Mii Costume sets. This is indeed, the ultimate Super Smash Bros. game!