What do the Blackhawks, Deadman and Woozy Winks Have in Common?

"What do the Blackhawks, Deadman and Woozy Winks Have in Common?" from DC Challenge #8 (DC, 1986) by Gerry Conway, Rick Hoberg and Dick Giordano

They were all in DC Challenge, the 12-issue series that had different creative teams on each book leaving the next with an ever-impossible cliffhanger/continuity mess to continue and/or resolve. As part of DC's 50th Anniversary celebrations (like the better-remembered Who's Who and Crisis), the participants could use any characters in the DC catalog... and DID! See above for one of many examples. Over the year, the series also featured, in addition to DC's big names, Adam Strange, Congo Bill, Viking Prince, Detective Chimp, and Je'mm Son of Saturn. And that's just the most offbeat of each of the first 5 issues.