The 2007 Movie

The Plot, in One Paragraph

An origin story. Lion-O is a teenager at the start, third in line to the Thunderan throne behind his father Claudus and his older brother. Cat’s Lair is destroyed. The royal house flees. Third Earth is the destination. Slithe leads the Mutants from inside a fighter ship, Mumm-Ra waits in his pyramid. Panthro’s skin is purple (a deliberate de-stereotyping move, per the press of the time). Snarf does not appear. The Berbils are referenced but offscreen. Cheetara and Monkian get a comic sequence. Lion-O is given a love interest named Kaeli. The Sword of Omens, the Eye of Thundera, the ThunderCats insignia, and the “sight beyond sight” idea all arrive in their canon forms. The film ends with the survivors landing on Third Earth and standing together as the ramp retracts on a departing ship. It plays as a hard PG-13 left open for a sequel.

What Happened

The project went through two drafts. Sopocy turned in the first, was hired for a rewrite, and turned that in too. Concept art surfaced online in mid-2009. A short CGI test clip of Lion-O versus Slithe leaked to YouTube in 2011. The film was never greenlit. The animated feature was shelved, the 2011 Cartoon Network reboot took the property in a different direction, and ThunderCats stayed off the big screen.

The closest the property has come back to a feature since: in 2021 Adam Wingard signed on to develop a live-action / animated hybrid ThunderCats film for Warner Bros. Wingard has said publicly that he read the unproduced Sopocy and earlier-attempt scripts and found them “not bad,” using them as a foundation for his own approach. That project remains in development.

Sourcing & Provenance

The PDF leaked to the internet on 1 February 2010. It was listed for sale on eBay and posted about by this site under its previous name (ThunderCatsLair.org) as a note on our old Facebook page. The press of the moment (Cinemablend, ScreenRant, ComicBookMovie, IMDb News) all linked back to the thundercats.org post. The underlying screenplay bitmap, the binder-hole punches, the title-page WGA contact block, the page numbers, and every line of Sopocy’s prose are untouched.