Given that we know that KLM has 22 Airbus A350 aircraft on order (eleven of the -900 variant, and eleven of the -1000 variant), with the first A350-900 being MSN 809, what do you think will be the most likely registration series once painted?

Here are a couple possibilities:
1. PH-AB* (A359) / PH-AC* (A35K)
2. PH-AE* (A359) / PH-AF* (A35K)
3. PH-AR* (A359) / PH-AS* (A35K)
4. PH-AV* (A359) / PH-AW* (A35K)

This is in line with their 787 orders (PH-BH* for the B789, and PH-BK* for the B78X) and A320neo family orders (PH-AX*/PH-AY* for the A21N and PH-AZ* for the A20N). But if I had to pick a category to name their A350 aircraft, it would be soccer stadiums around the world.