I can honestly see them put Pac-man or, to troll us, Heihachi. Maybe scum like Lloyd too.
I want a Digimon tho
If they included a Tekken character, I'm pretty sure it'd be Kazuya or Jin. Sakurai always goes with main characters for every single franchise with a playable representative in Smash - Pokemon being the only exception, with Pikachu, the main mascot, appearing two games before the Pokemon Trainer, who's technically the main character. Still, I think adding Tekken characters to the game isn't very likely. IIRC, Harada was surprised when the idea was mentioned to him.
We're likely getting the unrecognizable modern Pacman before any other Namco/Bandai characters...
Yeah, Magnus is assist trophy at best. And Medusa is just second banana to glorious, fabulous Hades.
If they included rushed clones like Melee's, just to boost the line up, I could see Magnus as a potential Ike clone. Although, even in that case, I guess they could just make Chrom an Ike clone, reveal Chrom earlier, and leave Ike as an unlockable character. Either way though, it'd go against Sakurai's statements regarding large line ups, so it isn't very likely, unless Namco's staff manages to change his mind about clones/line ups (just look at TTT2).