The whole "one exclusive per month" idea is way too clean. You had to actually remove games from the 3DS lineup to make it work -- no Bravely Default?
I would peg Mario Golf for a January release since it was originally intended for release this year, but delayed. I think Nintendo will release Kirby in the last week of March in the West -- they like to have a strong release that week, and if they were planning on releasing it in January, I think they would've mentioned it in the latest NA- and EU-only Nintendo Direct.
Nintendo is keeping their cards close to their chest with 3DS games in development because they can afford to. I would guess that every currently announced 3DS title will be released in the first half of the year -- so I think I'd put Yoshi's Island and Layton vs Ace Attorney in April and May, respectively. Smash Bros is a different story. I think the Wii U version will be prioritized and will be released before the 3DS version -- Sakurai mentioned this as a possibility. So I'd say August/September for Wii U and October/November for 3DS.
Monster Hunter isn't confirmed yet, but I suppose a Holiday release is possible. A new Pokemon title is also very likely, though I wouldn't necessarily say Z, and I think August is too early.
I believe that Bayonetta 2 will be the first major Nintendo-published Wii U title after Mario Kart. I think Nintendo is aiming for the last week of March for Mario Kart, but they might miss it, having the game slip into April. Bayonetta would be May.
Yarn Yoshi and X over the summer sounds good, SMTxFE could be any time at all (could even be 2015), and Zelda U in 2014 is a fantastical suggestion (though not impossible).
And there are bound to be at least a half-dozen as-yet-unrevealed titles slated for 2014 release. In my opinion, Star Fox U is among them, taking the place of Zelda U.
