WAW was run by BA CityFlyer before who also tried ARN and CPH after SAS gave up. VIE was operated by Austrian F70s and almost every major German city has had a go. Lufthansa even gave up on MUC!
Since the same airline is unlikely to try again (BA and GLA /DUB being strategic changes via the wider BA group, later IAG) , the list of possible newcomers is tiny sadly.
Think Mahon is being dropped for next year also?