I wouldn't mind a DKR2 either, but I just hope that Monster is the one developing it! I want Retro to work another Nintendo IP or make a new IP themselves! Raven Blade looked like it had a potential and I would like to see how a new IP developed by Retro would look like!

Metroid itself was never huger seller, but it's very important and strong franchise that makes lots of hype. So probably holiday season or May-June like Nintendo done with Mario Kart and Splatoon.

Only problem I see for DQXI is that SQ few days ago said that game will be released by May 2017. in Japan, so DQXI maybe wont arive for Q4 2016. in Japan, not to mention West.

I am pretty sure that new 3D Mario will be NX launch title.

There was that rumour: 

Diddy Kong Racing 2 is a collaboration between Monster Games and Retro Studios with Kensuke Tanabe as the producer. Monster Games is also working on another side (small) project that isn’t related to Diddy Kong Racing 2.  Retro Studios is working on a separate main project of their own as well.  https://kevincallahangames.wordpress.com/2014/07/09/the-strange-development-of-diddy-kong-racing-2/

This year from same source we got rumour that Diddy Kong Racing 2 is now NX game, also in June Nintendo Files Diddy Kong Trademark in Europe.

As long as Retro is also working on a bigger project then I'm 100% OK with them developing DKR2 along with Monster! It also seems likely since Miyamoto once said that Retro is capable enough of working on 2 games at the same time.

We can only guess what N is going to do in terms of BC, but lets be frank - it really isn't a must-have feature. If I was Nintendo I'd drop the PowerPC architecture and go x86 like PS4 and Xbone. No point repeating what Sony did with OG PS3 and keeping the old hardware inside for HW BC, it only makes the console expensive and Nintendo doesn't want that. It'd be better and cheaper if they asked their low tier studios to port these 12-15 worthwhile Wii U games, after that they could start remastering the biggest games from the Wii (SMG, DKCR, Metroid Prime Trilogy, etc.) in glorious 1080p/60fps and with similar treatment to what Zelda:WW got. That's much better than wasting money on HW BC.

When it comes to BC, I think they should only keep the WiiMotes and GamePads compatible, but with a normal controler being the basic bundled one. GamePad and WiiMotes should be optional, sold separately for people wanting the Wii experience or off-tv play. And they should redesigne the GamePad, it should be FullHD and more modern, cause as far as I know it's expensive because its tech is so old that nobody uses it anymore. Basically, it would be a nice move towards Wii U owners, who could at least still use their GamePads with the new console and it would allow Nintendo to earn some more money from gamers who buy a new GamePad.

Also, I think people may be overestimating what the merging of the divisions will give. After all, there is a massive, massive gap between current home console games (PS4/Xbone level) and 3DS games. 3DS devs will have to learn how to make these HD games and will require the same learning time as Nintendo home console devs needed at the beginning of Wii U. Also, just because Nintendo is capable of pumping out 20 3DS games per year doesn't mean that these teams will make 20 NX games. They'll make 2 or 3 instead. I mean, just compare that upcoming Metroid space football shooter to Halo 5 or Uncharted 4... So yeah, I'm fairly certain that Nintendo will need Wii U ports (preferably somewhat improved to take advantage of better hardware) in order to avoid the killer droughts, especially in the first year.

3D Mario at launch
Zelda NX (Zelda U) around Feb
Metroid 3d - April
Animal Crossing NX - June

or the gap would be around 3 months with somewhat lesser titles in between.

The Games themselves aren't overrated, it's the number of fans/sales that they are supposed to do that is overrated

I'd like if the NX had more diversity, it's been like 3 years and the Wii U doesn't have a single god damn RPG, this CANNOT happen again.

Unless of course you count Mass Effect 3 and Deus Ex... which i don't, PS3/360 ports of games everyone already played... yeah no.