Presumably the joke is that Lois on Smallville has been involved with Aquaman and Green Arrow. If this continues, the entire JLA will have had the pleasure of...rescuing her by the time she gets around to Clark.

Fanfic | MVs

Clark: "Lois? She's bossy. She's stuck up, she's rude... I can't stand her."
Lana: "The best ones always start that way."

"And you already know. Yeah, you already know how this will end." - DeVotchKa