They’re not putting it that bleakly: “The animated series, which last aired in 2008, will get 12 new episodes on the forthcoming Disney streaming service.” …But let’s be honest, shall we? There are any number of characters in Clone Wars that need to be given honorable deaths prior to Revenge of the Sith, and a twelve-episode direct-to-streaming final season sounds like it’d do the trick. Especially since Disney wants to hit the ground running with its streaming service, too. So they might as well go for a Grand Harvesting.
Note: I may be talking out of my rear, here. I freely admit it, in fact. …Annnnnd maybe I’m not.
You need to check out Rebels. Several clone wars characters show up there.