10 Times DC Comics Tricked You
3. Yo-Yo Lives - Suicide Squad (Vol.2) #9
On a first read of the Suicide Squad, it seems as though the supervillain Yo-Yo is just one of many poor unfortunates to die while working for Amanda Waller, as he's eaten by King Shark in the third issue, and for all intents are purposes seems to die there.
Until six issues later, when it's uncovered that Yo-Yo was actually subjected to a much worse fate, as he's recovered from King Shark's maw alive. This means through all the team's adventures in this time, Yo-Yo was still with them - just trapped in the stomach of an angry fish.
While this would lead to an interesting reveal that the character was totally indestructible, he would still be retconned out of existence - and right as he got interesting, too.