The suit claims that the DC "Bumblebee" - a teenage girl with the power to shrink - could easily be confused with the Autobot "Bumblebee," reported Variety.
'Bumblebee' character, set to star in the first "Transformers" spin-off, which is due in theaters at Christmas 2018.
The company is now seeking to stop the sales of Bumblebee toy, which is part of the DC Super Hero Girls line of action figures.
DC Comics and Warner Bros. Announced the DC Super Hero Girls franchise in April 2015 as a partnership with Mattel. The TV series began airing in October 2015. The series features younger versions of DC superheroes, including Batgirl and Harley Quinn, as they attend high school.