Expected licensing agreement with a "Playa" ("the transaction") that failed to materialize resulting in reexam initiated by the targeted licensee under threat from NEOM that an infringement suit would be the result for refusal to license. That's my theory and I will be watching Pacer for confirmation. Microsoft is my guess. IM resigned as a result of the failed negotiations. ALL SPECULATION AND IMO OF COURSE!
JP - the USPTO has docketed the case but has not made a decision regarding it's merit at this point. Anyone can research the associated documents here. Application number 90009814, check under the Image File Wrapper to view docs. The Corrected Original Ex Parte Request document (39 pages) is a good place to start to get a flavor of the prior art case presented by the Webb Firm.