C or G
Even if it was only for a couple of years, it'd be so cool to say that Nintendo has the most powerful console, after being behind for the last few.
However, I only just got my Wii-U so it'd be great if Nintendo could just ride it out for the next 2-3 years, get some amazing 3rd party games and wait to see what Sony and Microsoft do with the 'PS5' and 'XBOX TWO'
I feel like power is the reason why Nintendo isn't getting third-party support now, and third-party support is what is killing them when people think about buying a Wii U.
People don't think "The Wii U has Super Smash Brothers, Mario, Splatoon" etc., instead they think "If I buy this I won't be getting X' with X being pretty much every third party game.
By that math, the list of 'deficiencies' in the Wii U lineup is longer than its list of positives, making it look worse than it is.
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My vote, using my own options, is A/F/I because:
A: They need to close the power gap, which will both make third-party development less work (since porting will become a more straightforward process) and remove one of the largest knocks against it. After all, look at how much flak the Xbox One has gotten for what amounts to a 5-10% difference in power, and consider, the Wii U has it 5 times worse!
F: I think Nintendo's penchant for simpler, more colorful games would translate better to VR (at its current level of technical sophistication) than 'traditional' big-budget games will. And I would love to see Metroid Prime in VR. The fact that in-universe you are wearing a helmet makes the 'I've got a thing on my head' aspect of VR go from being an irritation to being immersive!
As long as they don't call it 'Virtual Boy 2', they'll be fine.
I: Announcing the NX makes it feel like Nintendo is holding back for the NX release. And yes, they DO need to have a killer lineup when it launches, but what they don't need is anything that creates the impression that the Wii U is low-priority for Nintendo, especially not with the NX launch at least a year out.