On January 7, 2013, Jeff Robinov (then head of the studio's motion picture division) founded a screenplay development department, nicknamed a "think tank" for developing theatrical animated films, known as Warner Animation Group. The group includes John Requa, Glenn Ficarra, Nicholas Stoller, Jared Stern, Phil Lord and Christopher Miller. Warner Bros. created the group with the hope that the box office reception of their films will be competitive with other animation studios' releases.
On February 7, 2014, Warner Animation Group released their first film, The Lego Movie, a film animated by Animal Logic, which also provided the animation for both spin-offs. It was met with critical praise and proved to be a box-office success. Due to the movie's success, a media franchise was created, with two spin-offs, The Lego Batman Movie and The Lego Ninjago Movie (both 2017), and a sequel, The Lego Movie 2: The Second Part (2019). While The Lego Batman Movie proved to be successful at the box office, The Lego Ninjago Movie and The Lego Movie 2: The Second Part were both unable to recoup its budget, with Ninjago being the first film from Warner Animation Group to be a box-office flop.
WAG's second film, Storks, was released September 23, 2016. It received mixed reviews from critics. On December 14, 2017, Warner Bros. announced Allison Abbate had been named Executive Vice President, and Chris Leahy has been named Senior Vice President.
Smallfoot, released September 28, 2018, received mostly positive reviews from critics and became a box office success. In October 2019, Locksmith Animation formed a multi-year production deal with Warner Bros. Pictures and Warner Animation Group, which will distribute Locksmith's films.
An animated reboot of the Scooby-Doo film series titled Scoob! was initially set for a theatrical release on May 15, 2020, but then it was delayed due to the COVID-19 pandemic. On April 21, 2020, it was announced that it would instead go to video on demand in response to the pandemic. It received mixed reviews from critics.
A live-action/animated film based on Tom & Jerry was released internationally on February 11, 2021, and in the United States on February 26, simultaneously in theaters and on HBO Max. The film also marked the debut of the company's new logo, made to match the November 2019 refresh of the Warner Bros. shield that itself debuted a month prior in Locked Down. It received generally negative reviews from critics, and is the first film from the company to have met so.