I think that it's a good thing that they bring back a sense of urgency to the game, I found Pikmin 2 whilst it was a better game, there wasn't as big a drive to finish it completely as there was in pikmin original.
What I would like from Pikmin 3 was that there was urgency for the first half of the game, having you be required to reach a certain goal before a certain time period, but after that you were allowed to continue after that and have a different objective after that which increases the longevity of the game.
Oh, and can we have less dungeons and more, larger explorable environment this time, and more bosses in those environments! My one major problem with pikmin 2, the best parts were when you weren't in dungeons, but that made up less then half of the game....
Something's coming up the plumbing, poor Luigi's in a bind. Giant turtles are out to get him, Creepy Crabs are right behind. Spiders, flies. Jeepers! Yikes!, They're coming out the pipes. "MARIO! WHERE ARE YOU!!!"