Forget about Norwegian, they are financial in very deep water and not reliable for the moment. Think about what happened with Primera Air. Now also Ryanair has to take more drastic descions after not good performance.
The real grow has to come from established carriers. Like I always mentioned, LH is the pain in the ass for BRU at this moment. They really have a big influence on other carriers to not fly to BRU or to not increase the capacity, * Alliance speaking of course.
SN is also not growing just like OS. The CEO of OS wants to replace the long haul fleet but he received a "NO" from LH bcs they are not profitable.
This is really cutting your wings
If for this year or not, we will see, but rather for next year I believe as talks with Far East, African and South America carriers is ongoing.
If LH don't allow to grow here, than other carriers from other alliances will do