Yoshi is only confirmed if you go by the logic that there is a level with him. If you don't flow with that, Yoshi is in no way confirmed.
Ooh he is confirmed. This is Nintendo logic, don't forget. They added an entire character(dr mario) just so they could have the music. If the level is there, the character is there.
Something that no one pointed out, the similarities between Wario and Bowser.
1. Both are important to the Mario Games
2. Both are playable in similar games
3. Both are rival characters
4. They have the same attack and landing lag animations for their fair's and bair's
5. They both look awkward when they run(and run slowly)
6. They are both power characters
7. They are both small compared to their average* sizes in mario games
*I consider Bowser's size in the old-school platform, get to the flag at the end mario games as average size
Is it possible that nintendo will swap vilans?
About four pages back(I can't find the post) someone asks if Dark Samus is expected given that ZSS is in and she was not as important. My answer is yes, and I sincerely hope that Nintendo is sensable and puts Dark Samus in the game. 'It' will be my new main.