The Danza: A variation. Don Johnson plays the similarly named "Von Jackson".
Defictionalization: It began its life as a fake trailer attached to Grindhouse. Rodriguez was planning on making it a direct-to-DVD movie in the first place, however, but was eventually convinced to make it for theatrical release.
Sartana had a slutty identical twin sister, also played by Jessica Alba by split-screen, who was constantly whacked out on NyQuil. The two lived together and greatly disliked each other.
Osiris had a female partner named Boots McCoy (complete with her own title card introduction, and played by Rose McGowan), who seemed to be quite crazy. In the deleted scenes she is the person who shoots Luz in the eye (by using a live cat as a silencer no less) instead of Von Jackson, and she also kills Sartana's twin sister by slitting her throat with a razor blade in her mouth, followed up by a scene of Sartana finding the sister's body and showing she really did care about her.
Sartana questions Senator McLaughlin and Booth in the hospital about the assassination attempt.
A scene of the Senator being interviewed by the Latina reporter at the station.
Dueling Movies: Went up against The Expendables for title of "Most Action-Packed Movie of 2010", and also the most manliest movie of 2010. It grossed less (37 mil for Expendables, Machete got 10 mil - it was a slow movie weekend, apparently), but gained better critical reaction.
Steven Seagal as a katana-wielding Mexican drug lord? That could work... Genius Bonus: Katanas were popular weapons in Mexico of the 16-17th centuries, brought over by Spanish ships to Aisa.
Senator McLaughlin isn't actually from Texas. His southern accent is totally fake. His real voice is simply Robert De Nirotalking normally. This is probably a reference to the fact that George W. Bush is actually from Connecticut.
Mean Character Nice Actor: Pretty much everyone in this film is a horrible person. In reality, most of the cast appeared as a personal favor to Danny Trejo who is known as one of the nicest actors in Hollywood.