Today Adobe released the final release candidate of the new Adobe Classic Lightroom CC to registered beta testers:
As I already reported, I expect the new version of Lightroom to be announced this month, probably during the Adobe Max conference (October 18-20, 2017).
The current Adobe CC plan rates can be found here. You can get a free Lightroom trial on this page. The last three versions of Lightroom can be downloaded here (see also this link for more information). Adobe's website has also a dedicated page for Lightroom CC.