She already has 30 stadium dates booked (only 1 less than the MDNA Tour) and will likely add more. Her ticket prices are also a lot higher than last time.
She'd have to announce a bigger arena tour for Europe and Latin America. And if the Asia leg rumor that she's doing stadiums, then she could come quite close.
Forbes predicted she would do $200m+ without an Asian Leg if her average ticket price stayed around $90, and since average ticket prices have actually risen (to around $100) I doubt she would need more than 100 shows.
She would need to add more shows, +200M definetly
But she could do 300M, with the asian stadiums dates (if it's true) and if she tours Europe and south america
Never. 
