The good news is that you could clear into First if and when U space opens up and not have to use any certificates but of the bad news is that there will likely be more competition for upgrades since every elite (and possible companions) would be on the wait-list with you. The timing of your flight is unfortunate... regardless of what the policy says online, we will likely need to wait a few months while the "dust settles" in order to find out how everything related to international upgrades actually works.