Justice League vs. the Fatal Five

In the 31st century, Mano, Tharok and Persuader of the Fatal Five attack the Legion of Super-Heroes' headquarters for their time sphere. Star Boy, Saturn Girl and Brainiac 5 try to keep them back but fail. Just as the villains activate the sphere, Star Boy leaps at them and is taken along. Arriving in the 21st century above Earth, Star Boy triggers a boobytrap Brainiac 5 programmed, trapping the villains inside the sphere in a stasis field. Star Boy comes down in Gotham City while the sphere ends up in Metropolis. Star Boy discovers his supply of medicine, needed to stabilize his mind, was destroyed in his rough landing. As his medicine doesn't exist yet, Star Boy's increasingly erratic behavior gets him apprehended by Batman and sent to Arkham. The stasis-locked time machine is picked up by Superman and brought to the Justice League's headquarters for analysis.