Here's a little trivia for the 1st movie from IMBD. All questions are hindsight questions.
Chris Columbus,
Raja Gosnell and
Peyton Reed were each attached as director at some point.
Question 1. Do you think they could have done any better, and who ?
Steven Soderbergh and
Sean Astin were both interested in directing.
Question 2. Could either done better, and who ?
George Clooney and
Brendan Fraser were considered for the part of Reed Richards.
Question 3. Better Reed or worse, and who ?
Paul Walker was considered for the part of Johnny Storm.
Question 4. Better Johnny, or worse ?
Julia Stiles,
Kate Bosworth,
Rachel McAdams,
Scarlett Johansson,
Elizabeth Banks,
KaDee Strickland were considered for the role of Susan Storm/Invisible Woman.
Question 5. Better or worse, and who ?
Tim Robbins was considered for Dr. Doom.
Question 6. Better or worse Dr. Doom.
James Gandolfini was considered for the role of Ben Grimm/The Thing.
Question 7. Better or worse Thing/Ben Grimm ?
When Peyton Reed was attached as the director, Renée Zellweger was considered as Sue Storm/Invisible Woman
Question 8. Better or worse Sue Storm ?
The script was developed for over ten years. The final writer was
Simon Kinberg, who worked on the movie throughout its production.
http://www.imdb.com/title/tt0120667/trivia