Isnt that pretty much the agreed theory at this point?
I'm saying it so it becomes a truth!
Is this the first time that Ninty has pushed back a release also?
I think it's more of a case that they announced this so early to possibly shore up support for the Wii-U's future while having a rough estimate of when they wanted it out.
most of the time Nintendo are pretty ho-hum about actual dates while showing off future products and thus when they say they want to work on them more no one gets upset because they didn't say it was coming out tomorrow or anything, but given the Wii-U isn't doing the greatest I'd say that was why they announced this so much earlier than normal.
Also would doubt they would bump it to the next console. I'd imagine that they are utilizing the gamepad quite heavily and it would be a sizeable redesign to move all that information in a meaningful way to the big screen. Also it was most likely to launch in Novemeber 15 anyway and has being pushed a few months into what I imagine would be Q1 2016.
I also wouldn't expect a new console until at least 2017. It would be suicide as a company at this point to launch a console against a mid-stride PS4/Xbone.
If anything, I'm going to guess that Nintendo are going to marry their home console and handhelds into a single machine come the NX and given the 3DS is still going ohk, I think 2 years to phase out both lines and launch a single line would make some sense.
And in saying all that garbage. Surely, worst comes to worst they'll Twilight Princess this new game and have it on WiiU and NX.