We were expecting to see Pikmin 3 this year: you were expecting it, we were expecting it. It wasn't shown off, though. Why not?
Speaking at the Nintendo Developer's Roundtable, Shigeru Miyamoto explained that, had the game been shown off today, it would have been lost under the reams of information about 3DS, Zelda and more. It's hard to argue – we posted around 25 news pieces during the last 24 hours – and although we have a special place in our hearts for Pikmin, it's likely Olimar and crew would have been lost in the rush.
It's still being developed though, so don't worry: we'll have shots of Pikmin 3 as soon as they're available.