Re: NSM's SSB4 Roster
I believe that there is way too many representatives in Zelda and Kirby. I think that Sakurai will be definitely not adding another Kirby character because he was already feeling guilty about having three characters in it since he didn't want to be showboating his own stuff, and was why we only had once course. Plus, Waddle Dee is too minor of a character to add.
I highly doubt that there would be a young link, and I'm still unsure about Ghirahim. I think that it would probably be better if they downsized the Zelda series to just Link, Zelda, and Ganon; they downsized the Mario series from Melee to Brawl.
I don't know enough about Dillon, but I mean they are adding a lot of new series into the game, so I guess I shouldn't be surprised, but I'm not sure being in one game they would include him in. Pac Man I'm not sure about, but I don't think they would just drop Snake so easily. With Kid Icarus, I'm not sure if Palutena is a good addition, though it would be nice to see her playable.
I'm sorry, but I'm highly hoping they don't add Ridley as a second Metroid character. He's definitely a great boss character like he was in Subspace Em, but really, I don't see how they could really work him in as a fighting character. Bowser, Ganon, and King Dedede are all understandable due to their size and such, but Ridley is a huge massive dragon-esque creature. I would rather have him as a boss like in Subspace Em. where he is full size than have him as a playable character modified to be the size of a character.
I'm not sure if Pokemon will grow to five, though I don't know. I could see that as being the most plausible list for the series, but I do hope they don't bring back Mewtwo. It all depends on what they do though. Same with the Mario series, I'm not sure if Toad would be the best addition to the game, as there are definitely some other Mario characters that would also make fine additions, though with the success of NSMB series, I would not be surprised by it. As for Donkey Kong, I really don't want King K. Rool in the series, especially since he's been kind of disappearing in the series lately, and rather have Dixie Kong or another Kong that's been very popular in the series.
Yoshi is definitely going to be expanding a lot with these two new upcoming Yoshi games, and I would like another Yoshi rep in the place of a new Mario rep, but I mean, I would not mind it just being Yoshi. Baby Mario as second Yoshi rep, I'll go up to the store now and prepay for the game so I can walk in and just get it as soon as it comes out. Wario is definitely in the same boat with the Yoshi series, so I wouldn't mind seeing another Warioware character.
Fox series seems fine, Pikmin series seems fine, Mother/Earthbound seems fine, Fire Emblem seems fine, there are a lot of characters in the bottom right that I am not well experienced with to give a good statement about...
Your list is good NSM, even though I have a lot of things I disagree with it. :P