It already went well ..according to Google Lawyers that has already happen with MS..namely they were forced by DOJ to divest of those patents bought through that deal and the Patent holding company was forced to license to open source at reasonable rates
That were Novell patents, which were very entangled in the whole SCO/IBM/Novell/Red Hat/Microsoft legal soap opera regarding Linux/Unix licensing. Basically Microsoft was caught hand in the cookie jar, hence DOJ's interest.
