In general, I'm ambivalent. My most wanted newcomers were Little Mac, Ridley, Tingle, Waluigi, and Takamaru. I also really want Snake to return. Little Mac is in, Waluigi is an Assist, and the other four characters I want are looking unlikely. I also have no particular attachment whatsoever to most of these newcomers, confirmed and rumored. Despite my personal feelings on the Sal Ramano roster, I could see it going either way still. I also think that in spite of his accuracy so far, there are a lot of reasons to be skeptical of the Sal Ramano leak. We've yet to have a Smash roster with newcomers that are all so obscure or recent.
Villager, Mega Man, Mii, and Pac-Man are obviously all big faces throughout the world, and Little Mac is an icon to (American) Nintendo fans, but Wii Fit Trainer is a well discussed left field choice, Rosalina is a second string Mario character who has only recently come to prominence, Palutena is an older character who has only become relevant again due to Sakurai, Greninja and Chrom are from games that released in the last year and a half, and Shulk and Marshall are both from games that sold okay (well... Rhythm Heaven sold well in Japan) but have remained fairly obscure to people who aren't die-hard Nintendo fans. To somebody whose main Nintendo love stems from the Gamecube era or earlier, most of these characters are completely alienating, as though this particular Smash Bros is not meant for them. I'm only 20, and that's kind of the way I'm feeling.
One of Sakurai's rules for including a character is "they have to make people want to buy the game", and given that this game has to "save" the Wii U, it doesn't make sense that Sakurai would skip out on so many obvious fan desired additions for all of these lesser known characters. It makes sense that he has revealed mostly left-field surprises so far to keep us on our toes, saving the big crowd pleasing reveals for the two E3's when they'll get the most exposure, but it would not make sense if nearly all of the newcomers defied expectations and desires in this way.
No retro characters despite Sakurai saying he wanted to add more this time around, no new DK, Zelda, or Metroid rep (Nintendo's big three long-lasting series after Mario, Pokemon, and Kirby), 8 of 12 newcomers being from previously unrepresented series... these things may very well be the case, but they don't line up with the previous patterns Sakurai has established. I know people are insisting these won't be all of the newcomers, but come on, there's 12, how much more are you really expecting? It just doesn't add up, and not in the same way as Brawl including R.O.B., Wolf, and Toon Link, because Brawl also included Wario, Meta Knight, Diddy Kong, King Dedede, Olimar, Sonic, Pit, Pokemon Trainer, etc... Characters who were desired, predictable, and could all be considered Nintendo "All Stars", even the first three I mentioned to varying degrees. Hell, Wolf, R.O.B. and Toon Link are all about as left field as Yoshi compared to Marshall...
On the flip side, it could all be true. Sakurai could have chosen all of these characters based on their promotional value for games he feels are deserving of more attention. Generally, when Sakurai wants to call attention to underrated games, he reaches back much farther into Nintendo's history, but it's possible that he decided to mix it up this time given the faltering nature of Nintendo's console games sales. If this is the case, then Sakurai's definition of what Smash Bros is has changed. With this fourth entry, he does not see it as a celebration of Nintendo's history and iconic characters, but primarily as a promotional vehicle. It could be that he believes all of Nintendo's biggest icons are already included, and it's time to bring in the new blood. It would not be that unusual or unprecedented for a crossover game. Lord knows Playstation All-stars was basically just a big advertisement. Disney has a similar thing going with Disney Infinity, in which lots of classic characters have been looked over in favor of the stars of Disney's most recent hits. Moreover, Sal Ramano is indeed 5 for 5 out of 6 announced newcomers, and the remaining 6 characters he's guessed are all still totally possible, with at least 3 of them (Palutena, Chrom, Pac-Man) looking more or less definite.
I'm not really interested in continuing the argument that has already been going on for like 7 billion pages, but I think that both sides have reasons for believing what they do, just like I think both sides of the "Ridley's shadow" debate have a case. I also just don't think it adds up, so I lean more towards the skeptical side, but I'm open to this roster and will probably buy the game regardless because I know that Sakurai will make these characters fun to play as, even if I don't find all of them particularly worthy of inclusion.