Sometimes, you just have to take another company's character, scratch off the label, and use'em for your own purposes.
Who are your favorite and least favorite proxies or parodies of other companies' characters at DC, and vice versa? (For the sake of this, and selfish reasons, I'm counting WildStorm as separate from DC; the High was an amazing Superman riff.)
The Multiversity surprised me, by taking a Justice League parody from a Marvel book where they're in a musical, and turning it into basically Earth Glee, still with a (now gay) Green Lantern riff wielding a flashlight. A riff on a riff of a revamp.
But, Morrison's always been a class act character thief, Doom Patrol villain, Mr Nobody, being a character from a Betty Boop cartoon