I kind of hope that this cancellation news turns out to be somewhat misunderstood or even downright incorrect, but I just traded messages with a friend who helps run one of the domestic Star Wars collecting sites and he seems to think there's something to this. The rumors have been circulating for a while now that the Ahsoka/Jedi Temple bombing arc might be the last cluster of new episodes that would be aired, but we'll see.
Jedinews in the UK has a pretty good track record of reporting reliable stories and other sites routinely link to them, but we'll see. Who knows what the hell the suits have done or planned.