The upcoming successor to the Huawei P10 and P10 Plus will be the P20 and not P11. This was confirmed in a Huawei launch invite teaser, which confirms the March 27 launch date in Paris along with indications of a triple-camera setup. We are also treated to a press render showing off the P20 and a possible P20 Plus.
https://www.notebookcheck.net/Huawei-P20-name-is-now-official-set-to-launch-on-March-27.286412.0.html