I know the movie was a sizable hit, but it was also pretty mediocre. Living in Sarasota, FL, it costume $8 to see it first run. It is one thing to see a movie for $8 - $15; it is another thing to pay around $200 for a ticket to see it live. I cannot believe that there are that many people out there who will be willing do so, without Hugh Jackman.
Let's say that HJ does agree to do it; it opens, gets lousy reviews, but sells well because of HJ. What happens when he leaves? The same thing that happened when he left Boy From Oz. IT closed rather than trying to replace him. Boy was very mediocre show, but it became an event only because of HJ.
Now, assuming that he does NOT want to commit to doing it on Broadway (why would he??). What other big star is there to fills shoes?