Okay so DLC wants and the odds they'd actually happen (assuming we're not getting a season 2 of DLC)
1. Skull Kid. Very unlikely to happen at this point, unless he had an important role in the next Zelda game and they wanted to use him as promotion. Chances: Very unlikely.
2. Paper Mario. Always thought he was a sleeper pick - he usually does pretty well on fan polls (so probably did decently in the ballot) and is recongisable (it's ****ing Mario). HOWEVER, his series is kind of in the ****ter right now, and him being a spirit may or may not mean anything. Chances: Unlikely
3. Rayman. Ubisoft and Nintendo are all buddy-buddy, and the former certaintly wants him in. Plus there's Ubisoft making games with Mario and Star Fox in and the whole Rayman fake hoo hah a few years back. However, his spirit may or may not mean something. Also, don't think he's very well known in Japan. Chances: Medium
4. Master Hand. If this was the base game, and Sakurai was fully in charge of the picks, I'd rate him higher. But no, this is DLC. No quirky picks unless your name is Piranha Plant and you're being offered for free. Chances: Abysmal
5. Professor Layton: Well, he's not a Spirit. And that's about it. Chances: Unlikely
Wait that's five and we only have four spots left o no