BM said that they were definately looking at other routes, they did/do BRS-BRU-BRS-FRA-BRS-BRU-BRS so people were thinking that could be a possibility but without 1. A morning/evening flight and 2. Interlining, I couldn't see it going down too well at NCL. As has been seen by the reduction of DUS to 1 daily... Granted, the times for DUS are even worse than a FRA flight would be.