Update: the Lightroom is now officially announced.
PCMag published their article about Adobe Lightroom CC hours before the official announcement:
Lightroom CC is now available as part of an Adobe Creative Cloud Photography subscription ($9.99 per month) or as the equivalent standalone $149 perpetual-license Lightroom 6 application. But the single purchase option won't include syncing photos to Adobe's mobile apps, such as Lightroom Mobile, Slate, and Voice. Adobe uses a smaller-footprint version of the photo file called Smart Preview for transmitting to Web and devices, so bandwidth and storage aren't taxed unnecessarily.
Update: LR6 is already listed at Adorama.