Many will shit you, but that's the perception some people have and that's generating a trend where NSMBU+NSLU bundle is enough for them. There's not a big difference to some, unlike other 3D Marios.

WRONG!!! US sales don't exist, and only Japan and UK sales count. Since Knack outsold it in UK for one week, it sold way more than 3D World globally. It also sold bad (For Mario standards) in Japan. That means 3D World sold 118k globally.

Logic...

Honestly in practise Nintendo has some of the worst, most finnicky fans. No wonder their sales are so bi-polar.

- Wants Wii U to do well
- Likes Mario
- Refuses to even play game because camera angles aren't exactly what he/she wants and some pre-concieved notion that game isn't exactly like previous subset of games. 

LOL. Nintendo fans make such a big fuss on internet forums but in reality they often don't back up a lot of their talk. See: some of the most ardent, vocal Wii U fanatics on this board don't even own the system themselves.

When Nintendo can't even get these people to actually buy their products, what chance do they have with other demographics? 

That can be at both sides. People defending the game without even playing it.

3D World isn't selling too bad, but it's not the game Nintendo needed to improve Wii U sales. It's a good game, but not revolutionary, isn't going to attract much in a way of new people.

Why would you be happy that a great game is selling sub-par compared to other titles?

Do you like seeing Nintendo perform poorly?

and F.L.U.D.D from Sunshine wasn't a gimmick? ok dude.

Its going to sell atleast 1 million by the end of the year worldwide, and if thats the case, then it is far from a flop, expecially on a small install base. Wonderful 101 was a flop (90,000 K), Infamous 2 was a flop (1.6 mil on huge install base), Gears of War Judgment was a flop (1.28 mil on a huge install base. Nintendo is struggling to gain traction in the UK, but thats no worse than Xbox being dead in Japan. Either way Wii U Europe sales are up too, and considering how awful they have been, any improvement is good improvement.

FLOP? i think it is the 7th best game sold world wide this week --'

http://www.siliconera.com/2013/11/16/nintendo-arent-done-super-mario-galaxy-yet/

Then, Mario co-creator Shigeru Miyamoto pitches in. “Just so there is no misunderstanding, I should point out that this doesn’t mean we’ll never make another Super Mario Galaxy game,” Miyamoto clarifies.

He elaborates, “The same team can’t make both at the same time. And we can’t bring in a second party and slap the name Super Mario Galaxy on it. I suppose we could idealistically make both in Tokyo, but we want to do something new too, so there was that dilemma. Personally, I would like to take on a variety of new challenges with Super Mario Galaxy and design 2D Super Mario games in an easy-to-understand way within certain restraints.”

Personally, I see 3D Land and 3D World as a 3rd pillar of Mario games. "2.5D Mario", if you will. Time will tell whether Nintendo sees it the same way, but given how successful the Galaxy games were and Miyamoto's own words here, I don't expect Nintendo to forget about them. And there's no reason why we can't have all these different formulas alternating to satisfy as much people as possible.