Hmm hopefully he was exaggerating a bit, because if true it means that you don't have to unlock a dark world, or make any major land changes, or get any final gear, or anything...
I was hoping for a suprise twist - there's a dark world, just as big as the original! Or maybe something you do to change the environment (flood an area, use time to grow a forest, whatever).
I mean, you don't need ANY items to get to the boss? He's not at the end of a temple full of puzzles? You don't have to do anything in the game? You don't need to do anything regarding the triforce? Seems weird.
So I'm thinking he means you can run through and do all the necessary stuff, ignoring side stuff, and basically run straight to the boss. Not LITERALLY run straight to the boss.