If he liked Ravenloft, there are 2 more sets of the same game out there. Wrath of A....something & a Drizzt set. The rules are very straight forward, but the game can be quite brutal.
If he likes tile games like that, I'd advice you to take a look at zombicide. It very very good. Easy to learn and loads of fun. And you're in luck, they just started a new kickstarter named the green horde. Great bang for your buck. Downside is that you will have to wait a while to get it. But you could always get a older set from a store.