Not sure how to feel about a Greatest Hits, on one hand I worry that this will flop badly, but I'd love to get a collection with all the singles, music videos & xmas songs.

Didnt they say there will be a long gap before the next studio album so if thats true id say a greatest hits will be the next release, with 4 albums of material they have enough to do a best of and it could do ok for them, they would need a new single to promote it though.

^I don't think they said that, there's been news about writing for the next album since early this year.