Deathstroke had actually arrived before them.
It was known that Living Dead Cage had two companions. All three had emerged from a remote warehouse district before splitting up.
Clearly, Zombie Reed's Teleportation Portal should have been inside that warehouse. No matter who occupied it or whether there was some secret underground laboratory there, the people inside were likely doomed.
Su Ming guessed that the three Zombie Heroes had eaten in the warehouse first, taking the edge off their hunger, before splitting up and each heading in a different direction.
Perhaps they had eaten something first, or perhaps their remaining sanity had reminded them to avoid street cameras. In any case, only after traveling some distance away from the warehouse did the three begin another round of feeding.
From this, it could be inferred that after eating their fill once, these zombies entered a satisfied "sage state" for roughly ten minutes or so before feeling hungry again and gradually losing control.
Su Ming had originally planned to go straight to the warehouse and shut down the Teleportation Portal, but the Adjutant reported seeing Nick Fury, Hawkeye, and Howard the Duck enter the warehouse, so he changed his mind.
Regardless of who the warehouse actually belonged to, it should have been connected to S.H.I.E.L.D. And with Howard the Duck appearing there, it meant that what Nick Fury had been preparing lately was A.R.M.O.R.
That made sense. Su Ming was always leaving 40K Earth, and after all these years, Egghead must have noticed something. With technology advancing, he had surely learned about the multiverse through certain channels as well, and had become quite interested in it.
But S.H.I.E.L.D. was an organization meant to protect Earth. Sending it into Parallel Worlds to step on landmines would have been a waste, so A.R.M.O.R. came into