Well, that might be the case as GameStop purportedly has a listing of the expansion up for Power-Up Reward members. While the listing doesn’t give any details or box-art, it’s still worth noting since Half-Life 2: Episode Two was released back in 2007!
Oh, we have a pic of the listing just for you! (courtesy of NeoGaf)
Of course, this doesn’t confirm the game’s existence, so take it with a grain of salt. For all we know, this might have been listed there ages ago when people thought Valve wasn’t a crazy company that hated money; but it’s also worth nothing that why on earth does GameStop have a listing for a game whose last episode was five years ago.
Let’s hope this is real — y’know, to tide us over till Half-Life 3 comes around.