On the one hand, I would be fine with all five characters included in the "leak" (I was a major supporter or Sami, and I believe I was the first to bring up Skull Kid in this thread - after I was the first to suggest Vaati and we all know how that didn't pan out. I was won over on Lyn because of the possibility of her being a Vergil/Setsuka-type character with fast strikes and an Iaido style, and I've always liked Isaac as a suggestion but wasn't particularly adamant on his place in my +1's. Knuckles is meh to me just because we could've gotten another Nintendo character when a third 3rd-party) On the other hand, I'm a little disappointed that Sukapon isn't the fifth character over Knuckles, because Sami, Skull Kid and Sukapon were my S-Tier wanted picks. Haha, that's just me, though, but if the "leak" does end up being true, then I really wish that they would've decided to tackle making Sukapon from scratch as like the final Clone Character and made a completely awesome moveset and character from him/her/it/wumbo (and it's not like planning a moveset would be hard considering that there was a completely sprited-out moveset for Sukapon as an Expansion Character in SSF2 that they could draw from; it's making the moves that'd be the difficult part, as they'd probably have to do basically everything from scratch).
But again, that's just me, haha. I'll accept Knuckles, and I'll probably even have fun playing him, but I just wish his slot could've gone to a Nintendo character (and for me personally, that character would be Sukapon).