"People say things like that all the time."
Yeah, it's easy for someone to say "Hey, I know an actor who knows Stephanie who says she will definitely play Elphaba." I just did. Don't take it seriously yet; treat it as a rumor until there is an official press release or article or something.
"We like to snark around here. Sometimes we actually talk about theater...but we try not to let that get in our way." - dramamama611