That appears to be the leading speculation anyway, but EA already has animated flick Dead Space Aftermath due this winter. What is Sabotage?
It's likely something to help promote Dead Space 2 when it releases next year for Xbox 360, PS3 and PC. If it's an animated film then it's likely going to be similar in vein to Dead Space: Downfall, which proved rather popular and managed not to suck - weird.
It could also be an online game of some sorts too - we'll just have to wait.