In the episode "Apokolips...Now!", Dan rallies his fellow Metropolisians (Metropolitans?) against Darkseid, frees the captive Superman, and delays the Apokoliptean (Apokoliptolistists?) army until the New Gods arrive with backup...and Dan is killed by Darkseid simply to pour salt in the wounds of Superman.
He is buried with full honors and saluted by his friends and companionsbut you're not seeing them all in this clip. In the original funeral scene, edited out in rebroadcasts and on DVD, his services were attended by his many creations, "including Nick Fury, Fantastic Four, Big Barda, Scott Free, Orion and others, alongside Kirby's friends and fans Mark Evanier, Bruce Timm, Paul Dini, Alex Ross, his father Norman Ross and Stan Lee. These characters and persons were later removed and the scene pacing was re-edited for subsequent airings and its DVD release." (Wikipedia: Superman: The Animated Series. Accessed 2009-08-28.)
Farewell, Dan. You'll be missed. Farewell, Jack. You'll be missed.