California Superior Court Judge Elihu Berle has ruled (without commenting on the merits of the case) that Activision has provided enough evidence to allow its $400 million lawsuit against Electronic Arts to go forward. The case is tied to Infinity Ward founders Jason West and Vince Zampella. A trial is tentatively scheduled to begin sometime in May.
Activision has accused EA of helping West and Zampella breach their contract, that EA received confidential information from the Infinity Ward founders, and that the duo held back the release of Modern Warfare 2 DLC to benefit the release of an EA game. Activision added EA to its long-running legal battle with West and Zempella as counter-claim to their lawsuit. West and Zampella filed a $36 million lawsuit against Activision, claiming they had been let go to avoid making royalty payments on Call Of Duty: Modern Warfare 2.
Around 38 other former Infinity Ward employees added themselves as plaintiffs alongside West and Zampella, accusing Activision of holding the development team "hostage" by withholding agreed payments until the completion of Modern Warfare 3.
Expect this case to be a blood bath no matter how it turns out.