Re: The #4 movie - which movie series will have it first?
On the subject of prequels and sequels, Indiana Jones and the Temple of Doom is a prequel. It's set before Raiders and the Last Crusade. However, it's still considered the #2 film in the series.
And going back further, The Good, the Bad and the Ugly is a prequel, set before both A Fistful of Dollars and For a Few Dollars More, but is also considered the 3rd film in that series.
And looking at a long-standing series like James Bond, Casino Royale, QOS and Skyfall are all prequels (and reboots) to the original 20 films, but Skyfall is still refered to as Bond 23, just as CR was Bond 21 and QOS Bond 22.
Anne Hathaway: "You did not just ask me that!! What a forward young man you are!!! My goodness!!"