Well, Metroid was dead for a long time and it came back strongly. DK would come back even stronger, the series has millions of fans worldwide and it was one of the few home console games to have all of it's main titles clear one million in Japan. In fact, the series rivaled FF and DQ while on the SNES.
I'm sure plenty of people are still awaiting for a DK game, and there's the fact that DK has a more family friendly image and has gathered a huge fanbase that will not suddenly forget about its existence.
Proud poster of the 10000th reply at the Official Smash Bros Update Thread.
tag - "I wouldn't trust gamespot, even if it was a live comparison."
Bets with Conegamer:
Pandora's Tower will have an opening week of less than 37k in Japan. (Won!)
Pandora's Tower will sell less than 100k lifetime in Japan.
Stakes: 1 week of avatar control for each one.