It's pretty evident to me that Nintendo is focusing on the version of Smash Bros which is coming out first. After that game launches you'll see them focus the attention on Smash Bros Wiiu. I don't really see any evidence of it not coming out this year.

you do expect, you simply don't want to. it's called bias, haterism...

How the devil is the Zelda demo from 2000 remotely comparable to this situation?

As for second place this generation, unless amiibo takes off massively, Nintendo can kiss second place goodbye: they simply don't have the software support to maintain a higher global baseline than Microsoft, who will continue to receive large amounts of third party support. Nintendo, without a mass-market hook, and with Wii U having failed to make any meaningful headway so far, aren't going to turn the system around now.

As for Nintendo not announcing details on Smash U yet, it does make sense. Every reveal up until the last few weeks has largely composed of footage of the Wii U version. The majority of footage at E3 was for the U version. The 3DS version is getting attention now because its release is imminent, Nintendo can turn the spotlight onto the Wii U version once the 3DS version is out the door globally. 

As for Bayonetta 2, we're getting information now because the game is close to release, around 6 weeks away. If Smash U is debuting late November/early December, Nintendo should host a Smash U Direct sometime next month. There's clear precedent for Nintendo to do this; Aonuma wanted to reveal Zelda U at E3 2013, but held off because of Wind Waker HD and Link Between Worlds. Mario Kart 8 had a Direct one month before its release, Hyrule Warriors had a Direct last month. Wonderful 101 had a Direct a few weeks before release. 

Nintendo have announced pricing details for amiibo globally. Smash U is the launch game for amiibo, and amiibo is still coming this year. A delay isn't on the cards at this point.

Fewer people will buy the wiii u if they miss the holiday sales season in the West particularly if they miss Black Friday 

kust as importantly it will hurt their momentum

No, but it'll cripple my bet with Jizzbeard.

I think it's a huge opportunity that shouldn't be missed. December release at latest would be best. I think Smash will still sell amazingly regardless, but this is important.

Maybe it will come this holiday but miss black friday, is not like it has never happened before Melee was released on december 3rd, what will happen then? they are keeping their promise (winter 2014), but they are missing the push of the shopping spree... what will happen then?

They're promoting the 3DS version first because that's what's coming first. They're really just worried that Wii U will cannibalize the 3DS version, because the series has always been on consoles.

I think this question is self explanatory. That would be a very very very hard, and almost impossible for Nintendo to stay second.

I really don't think its going to be delayed, Nintendo is treating the Wii U version as the Wii U's holiday flag ship title. If they delay it till next year you can cut Wii U sales this holiday season in half and Smash U sales by about a good 25%