The emerging spat between Activision and the heads of Infinity Ward may have been caused by unpaid royalties.
The report also states that the "insubordination" IW bosses Jason West and Frank Zampella appear to have been sacked for was caused by secret discussions with rival publishers.
Infinity Ward partially owns the rights to the Call of Duty IP, and the studio's contractual obligations to Activision end October 2010, the report pointed out.
News broke early this morning that security had arrived at Infinity Ward to give West and Zampella their marching orders, following an internal human resources inquiry.
There's still been no official response by Activision or Infinity Ward.