That's it, I think. If studios would be banned (somehow) from making superhero movies, they wouldn't turn to intellectual dramas instead. There were few superhero movies in the 90s, but to my mind, there is really no conceptual difference with mega-hits like Jurassic Park, The Matrix, Armageddon, Men in Black, and so on, or a lot of Disney stuff. I mean, just take a look at IMDB's list of the 20 highest grossing films of he 90s (l
ink to full top 50):
1. Titanic (1997)
2. Jurassic Park (1993)
3. Star Wars: Episode I - The Phantom Menace (1999)
4. The Lion King (1994)
5. Independence Day (1996)
6. Forrest Gump (1994)
7. The Sixth Sense (1999)
8. The Lost World: Jurassic Park (1997)
9. Men in Black (1997)
10. Armageddon (1998)
11. Terminator 2: Judgment Day (1991)
12. Ghost (1990)
13. Aladdin (1992)
14. Toy Story 2 (1999)
15. Twister (1996)
16. Saving Private Ryan (1998)
17. Home Alone (1990)
18. The Matrix (1999)
19. Pretty Woman (1990)
20. Mission: Impossible (1996)
The only films here that could be accused of real artistic value (very loosely defined) are probably Forrest Gump, The Sixth Sense, and Saving Private Ryan.