For each creature your opponents control, create a 4/4 green Beast creature token. Each of those Beasts fights a different one of those creatures.
11/4/2015 Players can’t cast spells or activate any abilities in between the Beasts entering the battlefield and fighting the other creatures. If the Beasts entering the battlefield cause any abilities to trigger, those abilities will be put onto the stack after Ezuri’s Predation is finished resolving.
11/4/2015 You choose which Beast is fighting which creature an opponent controls.
11/4/2015 Each of the “fights” happens at the same time.
11/4/2015 If Ezuri’s Predation creates more than one token for any given creature (due to an effect such as the one Doubling Season creates), the extra tokens won’t fight any creature.