binau said: "I don't think Darren is single-handily selling all these tickets but I would suggest a familiar name and face can help influence a buying decision in combination with other factors (positive word of mouth, reviews, awards etc)."
I do also think there's something to be said for the changing of his target demographic. While he's definitely still most popular from Glee, the 13-year-olds of 2010 who watched him on the show are 28 now, and with the right promotion, they definitely have much more of a disposable income now than they did when he was previously on Broadway.
"I think that when a movie says it was 'based on a true story,' oh, it happened - just with uglier people." - Peanut Walker, Shucked