My comment might be a little rushed and featherbrained today, so apologies in advance...
Incineroar (Pokémon series)
Chances: 34%
I do not think we'll get a Pokémon newcomer this SSB. I figured I should state that first to explain why I've given Incineroar such low chances in comparison to more obscure characters. This is actually roughly where I'm placing a lot of Pokémon this time around, again, because I do not think we are getting a Pokémon newcomer.
There are reasons for believing that the pattern of a Pokémon newcomer is to be broken with this SSB, and not just because of the limited newcomer expectation. Timing is an important factor, with the current belief being that planning for this SSB was finished end of 2015/early 2016, as well as the belief that the roster has had an impact on the character inclusion. Pokémon Sun and Moon was yet to be released in both cases, so any Gen 7 Pokémon has neither of the two benefiting factors, add onto the fact that this SSB will be releasing closer to Gen 8 than anything (which I also don't see happening, at least until DLC). There is also the factor that we've already received a ton of playable Pokémon through everyone returning, so I see the focus being elsewhere in terms of newcomers, unless a particular Pokémon gives Sakurai a truly unique move-set idea.
Of course, that is just my view on a Pokémon newcomer (more specifically Gen 7) as a whole; what about Incineroar specifically? Well it has things going for it; those anime leaks suggest that Incineroar and the other starter's were finalised early on, with perhaps enough time for Sakurai to pull a Greninja. Incineroar does look like a natural born fighter and a wrestling style has plenty of potential for unique fighting style and presentation. Of course, Incineroar also has to compete with the other starter trio, there already being a heavy weight and fully evolved Fire Type Pokémon playable, along with competing against more heavily promoted Gen 7 Pokémon such as Mimikyu, the Rockruff line, the UBs, Type: Null, etc.
Want: 26%
Well... Incineroar is a first party character, there's that at least. I also started off with Incineroar, and would certainly prefer it playable over the more popular starter suggestion of Decideueye. I do feel there are better Gen 7 choices though (I do not care one drop for UBs, but I do feel Nihilego would be a most fascinating choice) and overall would prefer there to not be any Pokémon newcomers. There are tons and tons of Nintendo series without playable representation, along with represented Nintendo series that could do with greater representation; both of which I feel have plenty of interesting characters and styles to offer up. To see yet another Pokémon added would always be disappointing, even if I like the specific Pokémon themselves (Kricketune is my favourite Pokémon, but I'd never try to suggest it for SSB, I see no reason for it to be playable)
Nominations: x5
Fatal Frame Protagonist
I see that Kamek has gotten through to rating day. I'll have to think of someone else to nominate alongside Fatal Frame Protagonist for the next time I comment here.