Storm, that's along the lines of what I'm thinking. I'm thinking PnP conversions or retellings inside the game, though.
I think it would be interesting to convert the essence, even if not 1 for 1, old modules. ToEE? Could be possible if triggers can spawn different maps and depending on the evolution of the mod tools.
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I may be reaching a little with that, but I was looking around for any recent game that would allow for that kind of map/scenario/dialog setup and I found myself skipping back to reliable NWN1. So it isn't exactly an RPG of that ilk, but I bet it could be made into something bearing the same feel. I could be full of it though.