Nintendo have announced a 35 minute long live stream for January the 16th that is set to reveal the final fighter's pass fighter for Super Smash Bros. Ultimate.
From Twitter:
"Join Super #SmashBrosUltimate director Masahiro Sakurai on 1/16 at 6am PT for a roughly 35 minute video livestream featuring an in-depth look at an upcoming DLC fighter, which he will unveil in the video!"
We have no real idea who fighter 5 is at the present moment with the expectation of some roumors that have been floating around . Its likely this steam will cover their reveal and give information on their pack. There's also a tiny chance of seeing some post pass dlc info, but we'll see.