I think some of ya'll are being a little ridiculous with DLC predictions. I doubt the roster will get to a 100 characters. The balancing would be just downright terrible. Not to mention we're running out of "worthy" Smash characters left to add. Out of the 1st party characters I can only think of Bandana Dee, Dixie, Impa, Skull Kid, Chibi-Robo, Paper Mario, Captain Toad, Cranky, ARMS rep, Elma, Rex & Pyra, Gen 8 Pokemon, and Fire Emblem: 3 Houses rep (assuming the Grinch leak is real).
As for 3rd parties I honestly believe we may get Rayman for a Ubisoft rep. If we get any other 3rd parties it's not gonna be Crash or Spyro since they are western and I doubt Sakurai contacts Activision and especially since neither series is popular in Japan. Yeah Rayman is western too but at least Ubisoft has more of a good relationship with Nintendo then Activision does...So for 3rd parties I honestly believe we'll get characters from companies already represente in Smash. While I can't stand the thought of 3rd parties in Smash, I could see Sora, Slime, Monster Hunter, Aiai, Tails, Lloyd Irving, Heihachi, the Okami dog (forgot the name), a Resident Evil rep, etc. basically only 3rd party characters from Square, Capcom, Namco, and SEGA.