In short: Tipster Evleaks has mentioned on Twitter today that while Motorola has cut a lot of its smartphone lines this year (including the Moto C, Moto M and Moto X), it is going to be doubling down on the Moto G lineup next year. Mentioning that there will be the regular Moto G7, as well as the Moto G7 Play, Moto G7 Plus and Moto G7 Power. That effectively doubles the number of Moto G smartphones that Lenovo launched so far this year.
Background: A few weeks ago, it was leaked that Lenovo would be launching a Moto G7 and G7 Plus next year, and this came out from some trademarks that were shown. But now, it looks like there are two more smartphones joining the lineup. The Moto G7 Play will likely be the lower-end of the four models - which was the case this year. While the Moto G7 Plus will be the higher-end and likely a larger display, and the Moto G7 Power having a massive battery included. That speculation comes from how Lenovo and Motorola have been using those terms for its existing smartphones. So take that with a grain of salt.
Impact: The Moto G lineup has been Motorola's most successful line of smartphones ever. In fact, it is the most successful phone line ever - beating out the RAZR from the flip phone days. However, under Lenovo, Motorola has gotten away from what has made the Moto G series so successful. This year, it effectively downgraded a number of the specs on the Moto G6, but also dropped the price. And this is likely because Motorola did drop a number of other lines, but the Moto G and Moto E have really started to converge, with almost no lines drawn between them. And unless Motorola decides to drop Moto E next year, that is likely going to continue.