Agree, ACMS. By all accounts, you won't get it again (but you can get another strain, if it develops).
This is typical of all Coronaviruses. The characteristic spikes are a defence against anti-bodies latching onto the virus, and if these spikes are subject to mutation, then 'last years' antibodies wont work. This is why the common cold and norovirus come back each year and re-infect, and a new flu vaccine has to be produced every season. SARS didn't come back, we don't know about this one yet.