I dont think anyone is really going to give 2 craps about Ep3 by the time its out, we all know deep down it's not going to answer any of the fundamental questions about the HL universe, like who g-man is, they need a way of continuing the brand onto it's next development cycle. And by the time its released the engine is going to look so old and dated it wont even have visuals going for it, the source engine is starting to look pretty dated already, by then we'll be seeing DX11 tech demos etc, lol