Unless there’s a twist involved regarding Clark’s lost 20 years, I don’t know how you could fold this back in. Whole premise seems to be that Clark is changed dramatically by what he went through out there, and now he can’t easily adjust to returning home. Priest is likely going to take full advantage of not being tied down by continuity here to let this Clark be different from Earth 0 Superman.
But there’s always a twist with Priest, so we’ll see.
Definitely should add the Lost suit to Clark’s armory in the Fortress regardless, because man is it cool.