Sir, i found this in the main website of PS.. quote from it "PSLegacy. This version of the game is obsolete, your character progress is not ported to the new release."
So i doubt if the event rewards such as progression points, or items will be ported to PS Unreal. Anyway, it will be a good experiment.
And lol, the legacy event starts at 2 am in the morning night for me, may be take a bit late time, in my timezone, hope i can attend it. All the best for the event!!