I do find it quite strange that two Star Alliance members would start flights to Shannon within a few months of each other. It makes sense for Lufthansa to add Shannon, but Scandinavian have a much smaller European network, and many larger cities are still not served by the airline. If both Lufthansa and SAS are successful, then it'll be great for the airport which relies so heavily on Ryanair. However I'd say that, at best, only one of the routes will be successful, and my bets will be on Lufthansa making the route work. It is interesting, however, that SAS are using the B736 and B737 on the route instead of the CRJ900 which commonly flies to UK destinations, so they must think that the demand is there to make the route work.