Hey Shortfuse. I think your trying to say this is the probable arrangement of how the roster will appear, not the actual roster itself. I don't believe this is the roster but I do believe this is likely how the arrangement will follow.
Anyway, if anyone hasn't noticed, that picture is a fake since its confirmed from the 2ch picture that Zelda and Sheik are both presentable in the player selection menu as sharing one space. Just a heads up, although most of you probably know that. Just wanted to clear that up. (I think Sheik will be selectable now actually after the first 6 Zelda color swaps and will be presented like Wario, who has 6 color swaps for his original Warioware costume and another 6 for his classic attire.)
So yeah, our starting roster does indeed make sense. We first had 8 starters in SSB. Then in Melee we had 14 starters, which was equal to the number of characters we received altogether from SSB. Looks like history will almost repeat, because from the 2ch picture, we have 25 "starter" characters which is equal to the total amount in Melee (Sheik didn't count back then since she wasn't treated with her own profile back, she was just an attack move, who happened to make a name for herself in tournaments). So if you count now, we have 18 characters + Zelda AND Sheik (who finally has her own official profile now on the Dojo, she didn't have one back in the Melee Dojo) + Samus and Zero Suit Samus + Charizard, Squirtle, and Ivysaur. That totals into 25 starters. So yeah. Looks like we do have some consistency in history, unlike the Dojo and their unpredictable way of giving updates.