You just have to get him moving faster than 10 meters per second per second, which I think is escape velocity, which is how they got rid of Doomsday in the Comics while he was resurrecting quite slowly after he and Superman sniffed each other in their first final battle.
I vaguely recall Doomsday wiping the floor with the Justice League not long before that.
Dude can't fly.
Remember how the speeders were knocking over the AT-ATs?
Impulse snares Davis around the neck with a larriet and the other end is attached to a space heading rocket.
Billionaires.
They're not to be fucked with.
Riiiiii-ght.