Motorola is working on the successor to the Moto X4 and it will be called the Moto X5. The name (and logo) were leaked by Evan Blass (a.k.a. @evleaks), in the same manner in which he leaked the Moto X4’s name and logo earlier this year.
Evan Blass (@evleaks) November 28, 2017
The Moto X5 will be unveiled sometime in 2018 – we can hope for CES in January or the MWC in at the end of February, but chances are slim. The Moto X4 was announced in August and released in October so it could be quite a while before we hear or see anything specific about the Moto X5.