Just read the blog entry, and I'd have to say that looking at the context, it's probably just something about or related to World's, not HGSS.Looking more closely, I think we need to be on the safe side and assume the worst, which is that the interview may be quite brief and will have little to do with the games. The description of the show mentions a report that was recorded at the WCS event, and since that's where Masuda was, his interview may end up being a series of questions related to his impressions from the event.
Unfortunately, I wouldn't put something like that past Masuda, considering that instead of announcing the remakes himself, he chose to talk about the Pikachu-colored Pichu in his previous Sunday appearances.
The way that entry reads, it makes it sound as if the interview was exactly what UL said.
Also, for the few of you that think he's announcing Houen, stop fooling yourselves. Even if Houen was in the game, it certainly wouldn't be announced before the game is released.
19 days to go!!