!!The comic character:
* FanonDiscontinuity: Originally Elektra was just a normal girl who ended up going down a very dark path after the tragedy of losing her father. In the ''Man Without Fear'' miniseries showing how Matt Murdock became Daredevil she's portrayed as having always been a psychopath, hearing voices and intentionally going looking for trouble so she could murder her assailents. In an odd parallel to [[ComicBook/{{Catwoman}} Selina Kyle's]] prostitute past from ''ComicBook/BatmanYearOne'', this is one part of an otherwise well regarded series that a lot of fans would prefer to ignore.

!!The film:
* CriticalResearchFailure: "[The sai is] an offensive weapon. For killing." No, it's not. It's a defensive weapon for disarming and breaking swords. A sai is capable of some pretty horrific damage against someone, but Hollywood treats it like a knife, when it's a blunt instrument.
* SoOkayItsAverage: It's not perfect, certainly not a bad film. But the lack of anything interesting about the villains and Elektra's character didn't help it. In the end it's just bland.
* TheyWastedAPerfectlyGoodPlot: In the Daredevil film, Elektra was killed by Bullseye. Now, one would believe this is what he spin-off movie would have been about: Elektra would hunt Bullseye down. Combine that with her becoming an assassin solely to have the funds and resources to find, as well as demonstrating more of Bullseye's [[IHaveYouNowMyPretty attraction to her in the first film]] to mess her up and other connections to the first film and you might have had a decent spin-off. Instead, it's a totally different movie, leaving her vengeance plot unresolved.
* TookTheBadFilmSeriously: Cary-Hiroyuki Tagawa turned in a very subtle and cool performance as Roshi.