Rumor: New Portal 2 DLC Coming Soon

I loaded up Defense Grid this morning and noticed there was a new patch with NEW Portal 2 content (not potato pack stuff). I think they fired their trigger finger too early, because the Portal 2 content is not yet available to play, but the information is in the game!

Apparently, they're expanding on the "portal-themed" levels DLC, perhaps in anticipation for new Portal 2 DLC?