I think the bigger story is this (from the Gamasutra article):

A California Superior Court has allowed Activision to officially add Electronic Arts as a defendant in its $400 million cross-complaint against ex-Infinity Ward heads Jason West and Vince Zampella, according to court documents obtained by Gamasutra.

I'm not a lawyer, but if EA is a defendant in this lawsuit now, does this mean that EA now has incentive to bring their legal team in to help on the defense? If so, that would seem like a case where Activision might be getting too greedy for their own good, as this case was apparently draining West and Zampella's personal funds: http://kotaku.com/5725056/activision-accused-of-stalling-in-modern-warfare-legal-showdown

New documents obtained by Kotaku today allege that Activision knew of EA's alleged involvement in the case over six months beforehand, and that by waiting until December 2010 to amend the case sought to have the beginning of the trial - scheduled for May - pushed back.

West and Zampella are protesting this expansion of the case and any possible delay, stating that the pair "are paying for this litigation from our own funds" and that to date the cost of the case has "[exceeded] our combined annual salaries".