A name change worked for ValuJet after the 1996 DC 9 crash, it bought a smaller airline called AirTran Airlines and merged under the new name. Boeing will need to do something similar with the MAX, after all the modification, recertifying and training required it would merit a new designation. Perhaps B737-2020 which would instantly differentiate it from the MAX, imply a clean start in a new year and assure passengers that all modifications had been carried out.