On some Edo Tensai Naruto fukkery?! NO THANKS
i mean its not out of the realm of possibility
One piece's final war is pretty much hinted at being something like one of those messy collages of fictional characters fighting each other
all sorts of stuff from space people(Winged races and possibly the space pirates as well as Enel and the spaceys), ninjas and samurai, Pirates, legendary and mythical animals, Marines, Minks, Fishmen, Giants, and all the other crazy shyt in the OP verse will fight.
those zombies wont be the main attraction like in Naruto, but it prolly will be a part of it.
Although I doubt Moriah will just resurrect a bunch of legendary corpses. But he might with 1 or 2