I'm wondering if Thor 4 has the potential to cross the billion dollar threshold considering that Ragnarok made nearly $900m and has only grown in popularity since it left theatres. With the return of Taika in the director's chair and some fan favourite characters like Thor (of course), Valkyrie, Korg and maaybe Hela (oh please!) and given a good release date I definitely think it has a pretty good shot. I hope so, Thor deserves to have a billion dollar grossing solo film like Cap and Iron Man do.