According to latest rumors from CR, Canon will have EOS M mirrorless body announcement in late August, 2019. The most likely EOS M mirrorless cameras could be EOS M5 Mark II or EOS M6 Mark II. A direct replacement for EOS M5 and EOS M6.
Along with EOS M body announcement, Canon will also announce two EF-M lenses. And until in 2020, there will be at least three EOS M bodies: EOS M5 Mark II/M6 Mark II, EOS M50 Mark II, EOS M500.