The row between the CME, CFTC and DTCC seems to have more smoke than fire if you read the last page of the PDF below. Whilst CME will report their cleared swaps into their own SDR, they allow a customer to request the same data is also sent to an SDR of their choosing, avoiding any lock-in.

Does anyone see how this could go to court?

http://www.cftc.gov/stellent/groups/public/@rulesandproducts/documents/ifdocs/rul120612cme001.pdf