Where does all of the talk about multiplayer come from? All I've seen is the sketchy Kotaku guy mentioning how it isn't a singleplayer RPG, which does NOT imply that it's multiplayer (in my mind), just that it isn't an RPG. 

The truth of the studio and the engine not being able to support multiplayer is far more convincing to me than some Bethesda-blacklisted journalist. 
But other than that, where does the multiplayer rumor come from?