This article is a year old, but it ranks Demko #4 among prospect goalies.
http://www.thehockeynews.com/blog/fi...-in-the-world/
I'm thinking after the season he had at Boston College (10 shutouts in 39 games), he should move up. I'd say he definitely overtakes Fucale and probably overtakes Subban in that article, given their results in the AHL last season. And can we still call Vasilevskiy a prospect? Yeah, I'd definitely say you could argue that Demko is the top goaltending prospect.