You're probably right about that with Mario and it is kind of a shame. Nintendo has turned it into something kind of like a Madden game of sorts, you make a game engine, then make a few games where you just slightly tweak the engine, bust out the cookie cutter and make some new stages. I'm not saying it's bad, but they don't really go crazy like they used to like the evolution of it on NES/SNES. I have no idea if he was right in what he heard or not, but I hope for people who have it they do make that sequel as Galaxy was awesome.
You're right about those Zeldas, but if you go back farther there were 'quality' and expansion delays with both the N64 titles, and I think the GC game got backed up too a bit. It's habit with them on that franchise as they always want to go back, do more, and get it right which is fine as rushing causes issues.
I know, I know all too well. The 3DS still gets the third party games, but it's nothing like it was the first couple of years at all. I know internally they've known of the New3DS for awhile, so it could be really a mix of shifting gears and also the tablet market kicking their ass too. It can not help having all those clip on Moga's(I have one) out there or the Nvidia shield either. If someone started making a phone that caught on where the thing slid on the back like an old keyboard phone (sorta like the PSP phone from Sony Ericsson) they'd be shit out of luck and right in the spot they are now with the WiiU. Trust me I've put a lot of thought into it and bounced it off my brother, it's something people I think they want to see Nintendo do. Their handheld line has and will remain king unless the floor drops out from under them. The console end by third parties is written off, but they like what they can do on a dedicated device still, and having them drop out (kind of) of consoles and do a combo high end handheld with a console dock for home gaming would set them apart and save their ass.
You know another thing I've considered was their old Yamauchi stance on, if the hardware fails, the IPs go down the toilet with it. Seeing how xenophobic the Japanese game industry is against the US (ie: xbox) I could see under the new leadership them branching if hardware did fail to being a Sony exclusive game maker albeit not second party while also finally supporting tablet gaming perhaps selling a controller(bluetooth) to attach to a tablet/phone to retain their 'Nintendo magic' feeling of gaming.