Darkseid's henchmen were interrupted from their personal battle at the end of "Alive!", but they were not summoned into the battle, which would have made sense since otherwise there seems to be no point that they were readied to do so.
Orion and S.T.R.I.P.E. were last seen at Luthor's Society after they showed up at the end of "Alive!", whose ending this immediately picks up from with nobody having been able to change position, but here cannot be seen among CGreen Lantern, Batman, Atom-Smasher, Captain Atom, Superman, Red Tornado, and Dr. Fate; S.T.R.I.P.E. is first shown in another part of the Watchtower as Patrick Dugan preparing his armor which he wore earlier while Orion is not seen again until the end, running down the stairs in the all-character cameo chase.