Actually AEA AGMA SM, investors in the original "mother" company don't have to invest in subsequent productions to benefit from their success. Typically, all of those subsequent productions pay either a direct royalty to the original Broadway company or the Broadway company participates in a share of the Author's subsidiary rights income. Since (almost without exception) all bottom-line money (after expenses) that flows back to the Broadway company is repaid to the investors until recoupment, those investors DO participate in all of that subsequent income even without being directly involved in those additional productions.
In any case, without putting words in his/her mouth, I think what quizking meant was "It certainly won't recoup on Broadway, but I doubt it'll end in the red." -- which is/would have been a perfectly reasonable statement to make.
"No matter how much you want the part, never let 'em see you sweat." -- Old Dry Idea commercial