Costume Quest 2 is a good follow up to the original, but doesn't take too many liberties to change up the game. It's still fun and funny as your trick or treat your way through the different worlds. It's worth the time and the money if your are looking for a RPG lite comical game.
It looks like a third entry isn't happening soon.
Just how do studios cope with the pressure to "produce a worthy sequel"?
I'm about 9 episodes into this and it's great. They've been recording it for long, long time, pre Kickstarter and Rhombus.
Don't be scared -- these Halloween games are perfect for all ages!