Creation
Van Wayne made his first and single comic appearance Batman #148 from 1962. He’s the young annoying cousin of Bruce Wayne’s, who unlike Bruce is a brat from the wealth of the Wayne family.
Major Story Arcs
When he comes to visit his cousin, and Dick Grayson, he would try his hand on trying to impress them, by pretending that he was Robin, and hired an actor to play Batman. This scheme of course didn’t work, and would backfire with the actor turning out to be a con artist criminal, however the day was saved by Batman, Robin and fake Robin. Van after this would disappear from comics completely, and Bruce’s family after reboots would be altered in ways, where Van’s existence would be impossible.
Other Media
Powerless
Van was a main character of the short lived DC sitcom, and was the only main character from the comics, being the boss of the division of Wayne Enterprises, that the main characters work for. Most is maintained with the character, being Bruce’s spoiled cousin who wants nothing more but to impress him. He would even in an episode wore a Robin costume hoping to be the next Robin, which was taken from his only comic appearance. Van Wayne was played by Alan Tudyk.
Arrow
While he never appears in the series, in the series finale a building with the name Van Wayne Industries can be seen, implying his existence.