The trailer to Mortal Engines looks interesting and piqued my interest in the series.
I know when Peter Jackson made the Lord of the Rings and the Hobbit they were planned from the start to be made as a series with filming being done back-to-back.
It doesn't look like this has happened this time, it could be due to the fact that the series takes place over a longer time scale, and some characters need to age and obviously we can't know what will happen, if the film bombs I'm sure any planned sequels will be shelved like the golden compass.
Have been any announcements or public statements about the intent to make more films? Even something about purchasing the rights to make them would be interesting.