Satoru Iwata has a Q&A with developers who worked on Wii Sports Resort posted over on Nintendo's UK site.
It's a very interesting bit of chat regarding all things Sports Resort related, and but one of the more interesting bits comes from a part discussing Miyamoto.
Apparently, he told a reporter at E3 2008 that the game included golf, but it really didn't.
Iwata: By the way, why did you decide to include golf in Wii Sports Resort?
Takayuki Shimamura: Well, after Miyamoto-san got back from E3 in 2008…
Miyamoto: Really? Is that right?
Shimamura: Right after getting back to Japan, he suddenly said: “You know we’re including golf now.” Apparently he’d stated in an interview that this time round golf shots would be determined by the backswing, even though at that time a golf game didn't exist in any shape or form! (laughs)
Iwata: It’s a trick he often uses! (laughs)
Miyamoto: That’s right. I block off the escape route.
Iwata: I’m not quite as bad as Miyamoto-san, but I have been known to use the same trick on occasion.
Loads more goodies through the link.