I agree with this, especially the customer bit, but all the open source evidence we have seen PM's deleted tweet, CAS and Air Marshal's mention of J-35 and simply the inherent infrastructure we already have in place, leads me to think we may be first in line, cash wise we know the Saudis are now favourable to us and understand the need for us to reequip quickly.
Also lets not forget this is China's first export of 5th Gen, even if it will be downgraded I think for the first time they may well be very sensitive about where the tech ends up, and we all know that every major UAE bases is swarming with Westerners....