A new certfication from the Moscow-based Eurasian Economic Commission (EEC) requested by the OEM Sony has come to light. It is for a "mobile phone" with the model number J9210. As it matches that of the Xperia 1 closely, it may refer to the rumored Xperia 2. On the other hand, it could also simply be a new variant of the 1.
https://www.notebookcheck.net/New-Sony-device-allegedly-certified-could-be-the-Xperia-2.423978.0.html