Brown Jenkin
First Post
Now that's the most logical interpretation of this I've seen yet. (Which is not to say it was a good move, but it's a clear potential motive.) This court case will potentially involve revealing details of the watermarking system, and thus quite possibly make them easier to circumvent. WotC hypothetically views this as "our PDFs will no longer be safe now that this case has been filed, so we shouldn't leave them out there". Definitely food for thought.
Except that John Does #4-infinity will just use the existing PDFs to distribute the existing stuff. This only works for new stuff that hasn't been released yet.