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At around 1 hour 19, the line spoken by Harriman (Michael Emerson): "This belongs in a museum, so do you" mirrors Harrison Ford and Paul Maxwell's exchange in Indiana Jones y la última cruzada (1989), when Indy loses the 'Cross of Coronado' a second time.
A second sequel was dropped, due to this movie not making enough money. However, Robert Rodriguez approached Sony with an idea that the Zorro reboot should be set in a post-apocalyptic future. But, Sony executives wanted the Zorro reboot to be gritty and be in the style of El caballero oscuro (2008), showing how Don Diego de la Vega became Zorro. Batman was heavily influenced by Zorro. The reboot was rumored to be titled "Zorro Reborn".
Adrian Alonso (Joaquin) did not know English, so he learned all his lines phonetically, just as Antonio Banderas did for Los reyes del mambo tocan canciones de amor (1992).
The locomotive used on the train at the end was not actually capable of moving under its own power. The illusion of it pulling the train was created by alternately using an out-of-vision diesel locomotive to pull or push, a bluescreen set up next to the steam locomotive with passing scenery added later, or an about 1/8 scale operable model of the train.
This movie went through many titles. It was originally called "The Mask Of Zorro 2" and then that title was changed to "Zorro Unmasked" which had been the original script title by Ted Elliott and Terry Rossio. After their script was not used the title went to "Zorro 2" then to "The Return Of Zorro" before Sony pictures finally settled on the title "The Legend Of Zorro".