VW can't even get their software to update OTA......they should start by making that a priority before anything.I'm pretty sure it's bogus, mainly because (indeed) Tesla needs no production techniques from VW.
Tesla providing batteries could however be useful (helping Tesla's mission and bottom line), but that was not a part of the rumor I heard.
Therefore: I don't buy it. But I just wanted to share it with my TMC friends.