Well I do want pikmin 3 to come I can live without it. Due to the long replayablity in pikmin 1.
and 2. But enough with that. What I want in the next game is have  use for those days.
They should have days where there could have droughts and when it rains. When it rains
the water increases or a certain lake gets bigger. In a drought its the oppisite. Where
the water decreses. Also they should add places that are diffrent like a desert or a swamp
or even a rain forest. I think their should be black pikmin which have all the ablities of
all the pikmin exept the purple pikmin powers. Which these come only at night. The game
should have harder puzzles and caves should return with being more harder.  I still
have a ton of more ideas I can go on forever. So what do you want in pikmin 3?
I also like this video. I agree with most and like most of them

i want more pikmin colors, and maybe co op

the same as darkheart709 said, maybe i would also like white and violet pikmin to have their own houses : P

Online multiplayer + Wii Speak + orchestral soundtrack please.

cool, the ideas on the videos are great! i want to join Pikmin fan club : )

I just want the bloody game. When are we getting it Mr MIyamoto? I'm fed up of waiting.

New colors such as Green and Pink(Green is my favorite color and pink just because a girl pikmin sould be made) and without a doubt CoOp!!

You should be able to be out at night. This would change the gameplay quite a bit but it would be cool to battle the night cretures.

Multiplayer needs to be expanded on, preferably 4 player co-op and vs multiplayer, both of which should be more in depth than in Pikmin 2

Purple Pikmin need to be nerfed (strength of 5 pikmin and even slower)

More powerups like the sprays

Maybe another type of Pikmin

Well, an extremely open world (Pikmin 1) without any time limits (Pikmin 2).

Also, add a green pikmin, for a start.

@ scottie, no I don't think purple pikmin should be removed.
I think white and purples should be given their own onions now and of course add at least one new pikmin (preferably green). Definitely no time limit.
Probably more I'll eventually think of XD.