As others said not being Metroid and not holding reviewer hands is the reason. Seriously professionaly are quite unprofessional.....
About the not being Metroid thing:
I also was super disappointed when Retro announced DKCTF because I wanted a new Metroid or at least their "own" IP. But now I got over it. The more I saw of DKCTF (music, stages etc) the more I liked it. And btw I still have to finish the trilogy of Metroid first so a new Metroid would likely collect dust for a while anyways (even if the next game will be a seperate story etc)
Every game Retro makes helps them in gaining more skill and gives them more experience with the WiiU hardware
Also when time passes there will be more tricks etc. you know stuff that differenciates Halo3 from Halo4 or Bad Company 2 from Battlefied 3. A ton of new effects made the games look much better than their older installments.
And I mean when a 2002 Gamecube game looks like this
What will a 2015/16 WiiU game look like?
For comparison
Halo 1 vs Halo 4
