It was kinda botched in Brightest Day: Aftermath. In Brightest Day, we see Holland resurrected and bonded with the green to become a new Swamp Thing. But then in Aftermath he's separate from Swamp Thing again and suddenly the Swamp Thing that's walking around is an entity not linked to him. And yeah, the "meh" nature of that story makes me think DC would have been as well just not doing it, for all it (didn't) clear up regarding Swamp Thing's new status quo.
To be honest, I know Snyder is trying to pay respect to the entirety of Swamp Thing's history that came before, but one thing I think he DID need to do his own version of was Alec Holland's resurrection. Explain, in a manner that better complimented his story, how Holland came back from the dead.