Never heard of this either, I think it would be very unlikely given that the brands are so very different. Maybe it was suggested by a forum member on KMO. I would be very suprised though if it were true.
The people want to be different, but companies like L.V. would be very picky about who they would collab with, if indeed they would ever entertain the thought. Companies with a synergy do good collabs, like our own Greedy Genius/Yoropiko, but when they are aimed at different markets then they can end up being a disaster.