As long as the 101st is Wonder Red.
Good idea. Here's a perfect 101, ending with Wonder-Red. If we do end up with 101 characters, I think it would be very close to this layout. I managed to keep all series together, in order of appearance, and each of the original series have at least one villain. Counting Masked Man and Black Shadow as echoes, it's an 81/20 split. Karate Joe and Mach Rider are the representative WTF and retro characters. I really think that, if we get Spring Man, Ribbon Girl would come along as an echo, but I couldn't get her to fit into the grid with perfect OCD. If I were to change one character, it would be Jody Summer in place of Celica, which would still maintain the same order, but Black Shadow would have to be made unique, so that Captain Falcon doesn't have 2 echoes.
Possible reveal schedule (the echoes can obviously come in any order):
Current 65/6ε
Online direct (September) 1+1ε
ɑ:
non-Smash content
Ω:
Gardevoir
ε:
Gothitelle
(Pokemon's mass appeal would be the best representation of Smash in a general direct)
Smash direct (October) 2+3ε
ɑ:
Isaac
ε:
Funky, Dixie, Isabelle
Ω:
Skull Kid
Smash direct/50 Facts (November/December) 3+6ε
ɑ:
Karate Joe (must launch with WTF)
ε:
Dry Bowser, Masked Man, Black Shadow, Black Knight, Shadow, Octoling
(Akuma/Evil Ryu could go here, as well, if they choose that over Ken)
Ω:
Kamek, Paper Mario
(Paper Mario would bookend with Mario having been the first character shown in-game)
Launch 71+16ε = 87
This is 10 unique newcomers at launch, which is less than Smash 4's 15 (including Miis and excluding Dark Pit and Lucina). That conforms to Sakurai's, "I kind of hope you're not expecting too many new challengers." 5 fewer uniques, 12 more echoes, which seems like a reasonable trade-off in development time. Keep in mind that Sakurai referred to Smash 3DS and Wii U as Smash 4 and Smash 5, because he considered the work near equal to two separate games. There's also other time-savers such as the portability of assets from Wii U to Ultimate and, as far as we know, no custom moves.