Personally, I don't expect much, maybe a brief explanation of his experience with developing Kingdom Hearts, a short explanation on why Missing Link is still missing and then maybe casually mentioning when we could expect to see more Kingdom Hearts news
The most surprising thing that we could get from this is if he reveals what the big Kingdom Hearts direction change was after the 20th anniversary event. But I don't think a interview with a magazine company really is the best place to reveal something like that, so chances of that happening are very slim.