As confirmed in the recent Nintendo Direct, the final DLC for Ultimate Smash Bros. will be revealed later today at 7 AM PT / 10 AM PT. It will be revealed in new episodes of Mr. Sakurai Presents, with director Masahiro Sakurai dive deep into the DLC and everything it will add, which will include a new fighter, a new stage, and new music. You can watch the presentation when it goes live below.
As Nintendo and Sakurai have emphasized more than a few times, this will be the last DLC fighter to add to it Ultimate Smash Bros.. The game launched in December 2018 and has seen regular DLC additions across two separate fighter passes. So far the second fighter bass has brought Min Min from ARMS, Pyra and Mythra o Xenoblade Chronicles 2, Steve and Alex from Minecraft, Sephiroth of Final Fantasy 7, and Kazuya Mishima from Tekken.
The sixth DLC and final pass of current fighters will bring the total playable characters in the game to 82.