Tough question... I've had a few, but they've all come true. Mother 3, Mega Man X Online, Mega Man Legends 3...
I guess I'd have to say a kirby game that breaks the mold of what the series is in- yes, epic yarn does that to a large extent, but I mean continue in the direction that Kirby 64 started off on. That was an exciting little change, and I think with some effort it could be something fantastic that revitalizes a beloved, but markedly stagnant (opinion) series.
Have you ever woke up in the middle of a surprise blowjob?
Edit: Shit was so cash.