A Realme Indonesia employee has posted a new teaser that strongly suggests a new phone with a 6000mAh battery will debut in this market soon. Therefore, it may make a worthy successor to a 5- or C-series device in these terms. However, the new potential threat to the Samsung Galaxy M series' might lacks an exact launch date at present.
https://www.notebookcheck.net/Realme-s-first-6000mAh-phone-is-coming-to-Indonesian-customers-soon.481223.0.html