Tale of Two Cities will not do well in the current Broadway climate...The age of the historical pop-operas on Broadway is over, as the Pirate Queen producers learned the hard way.
As for a show taking the Marquis, Cry-Baby is the best new musical I've seen this year (not that there were very many good musicals this year anywhere) and should be in tip-top shape by the time it reaches Broadway.
"It does what a musical is supposed to do; it takes you to another world. And it gives you a little tune to carry in your head. Something to take you away from the dreary horrors of the real world. A little something for when you're feeling blue. You know?"