5) The Last Airbender (2010)
M. Night Shyamalan's adaptation of the animated series "Avatar: The Last Airbender" is a disappointment with stiff performances and dull narratives.
The Story of Aang, the Last Airbender, could have made the movie long enough to tell Aang's story as well as his rise in trying to bring balance back to a war-torn world.
Here, fans of the show were disenchanted with this movie because the characters were less developed and the dialogues were clumsy. Straying away from the original material source added to fans' disappointment. Critics panned it, heavily trashing its pacing and exposition and using too little action or emotional connection.
Special effects did not do justice to the final product, and rather made it hollow and disappointing in the end, deprecating the popularity of the animated series.