The Lufthansa B77Fs will be new ordered in LH colours. Will eventually replace the MD11 fleet, so mixed feelings as it means another 3 holer service from MAN slowly diminishing.
With regards to the Saudia slots, what is also worth remembering is that the airlines themselves can get a bit excited with holding slots.
Saudia having 4 extra pairs than they require is nothing when you consider that back when Qatar were 4 weekly, they applied and held for 1 season 21 slot pairs. Delta have done similar and back before easyjet based at MAN, they held over 100 slots 1 summer! TAP were another candidate that applied for slots every season since 2004 until they finally used them.
The slots themselves therefore can mean little, but when flights make it to a GDS screen I do get a little more hopeful.