Well, while it's true that Lauren never explained the details of her vision, her reaction to Cadence and her lack of any further comments about the pink furball (despite being asked, mind you) speak volumes.
But you're right. For now we only have show canon, for better or for worse. And plethora of fanfics!
Actually, there's one thing to be grateful about canon riddled with more plot holes than Chrysalis' body - it allows crafty fanfic writers to work their gypsie magic.