Yoshi, brand will help it. I also think Mario Maker will just be an eShop game

Since Splatoon is a new IP it really just depends on how they market it

If Nintendo advertises Splatoon correctly it could push a lot of Wii U's

TF was just released at the wrong time, if it came out after Metroid it would have done better because alot of fans were mad that Retro Studios were working on this instead of a new Metroid and I guess didn't buy it even thought it is an incredible game

I said Splatoon.
i think that will be 30-35 % boost.
Yoshi and Mario 10-15 %...

This is sort of like debating what the best sales booster for PS4 is of these three: The Witness, Everybody's gone to the rapture and Alienation. None of them will be noteworthy (in boosting hardware sales, they'll probably be great games).

I think it's going to be a tough year of humble pie eating for Nintendo fans. Things like Bayo 2, Hyrule Warriors ... basically everything not named Smash are going to underwhelm/flop one by one. Wii U is very anemic in terms of software diversity sales, when even things like DKC have problems selling you know there's a serious problem.

Bayo2 will likely flop.

I'm pretty sure HyWa has already passed into the territory of "not flopped" by virtue of its budget likely being tiny, and the DLC will only turn profits higher.

In general, the way to look at any title launching on the WiiU at this point will be a question of: Will Nintendo see profits? Not will it "save the WiiU", that's a foregone conclusion and now any title launched on the system is just development practice with working with HD. I think the general answer for this will be "Yes" so long as the title sells decently. Bayo2 is likely the only exception as it is a rather large endeveour and not a Nintendo product. EAD, Retro, Next Level, or anything else first party will likely have budgets you can count on one hand for their games (except high profile titles like Zelda, which we know will sell multimillions) and since they are published under Nintendo, all but the store front profits return to the company and back into the studios.

No title I see or have seen, not even DT:TF, will be in the red at the end of the day aside from Bayo2.

Yoshi or Mario Maker would boost sales and it should be bundled too.