Where did you hear this? I've never seen anything of the sort, and I've been all over everything Skyward Sword.
Hang on... let me find this... aha! Here we are, it was in an Iwata Asks Interview. I think i made a mistake...yeah. It doesnt say anything about the story line connecting, just some gameplay aspects like going back to places you've already visited. Here's the interveiw itself, but it is roughly translated:
"Iwata: How different would Zelda become with Wii motion+ was a question when the project for wii motion+ started 5 years ago. and with 5 years...hahahaha
Miyamoto: Hahaha. Yep, I believe I haven't used the 5 years in waste. I don't know if the production cost is Nintendo's highest, but we've been spending a lot for this project and that's been used for inclination, volume, and idiosyncrasy(?).
Iwata: So it's built without losing creativeness, and creating a unexplored(?) idiosyncrasy. And I get an impression that this isn't about creating something with a huge amount, but with great density.
Miyamoto: This time it has a mechanism playing in a castle or in a dungeon with different types or puzzle, so it's hard so say it's this dungeon. It's a bit hard to map the concept. playing in a narrow place with a lock playing the different puzzles. We're able to create it so the more you play in that territory you'd get a type of attachment to that territory like the earlier Zelda's.
Iwata: So it's from Majora's Mask to create stronger density with the concept of going back to the territories, and you were able to create a type of completed system of that.
Miyamoto: So yeah it's grand yet you could get that type of feeling. Zelda is actually a bit hard with the actions, remembering each set action on what button, and this with Skyward Sword you are going to switch around different items. I won't say it's easy, but it became easier to use around the different items once you stared playing it. and you will use different items but you'll be able to use most of them with the 'A' button. Back then using different buttons could have confused the user but this time it's mostly a button. Once you get used to it it'll be comfortable.
Iwata: Both Mario and Zelda are going to be sold at the year-end. You'll be able to play both titles.
Miyamoto: Yes, we were able to get both titles out.
Iwata: I too am looking forward for both titles"
