For Oprah to be on Broadway, it would essentially boil down to her agreeing to do 12 weeks of charity work because Broadway could never pay her and the whole thing would a be circus.
Sadly Oprah can't take a small show or a small part and just act. Whatever she does would become an event. Huge theatre, huge ticket prices, huge security and audience issues.
As previously stated, the woman is like a world leader at this point and can't take off 6 months to do a show.
I think she is a great actress and commits fully to her projects but the logistics would be a nightmare and getting a ticket would be an impossibility.
Its the same reason Babs can't return to Broadway. Too much hoopla.
"The sexual energy between the mother and son really concerns me!"-random woman behind me at Next to Normal
"I want to meet him after and bang him!"-random woman who exposed her breasts at Rock of Ages, referring to James Carpinello