GM trademarks "LSX" engine name

General Motors filed for a trademark on the term "LSX" on June 19, 2006, according to the U.S. Patent and Trademark Office. The filing is described as relating to "engines for land vehicles." It's unclear if the trademark refers to a future Chevrolet LS-series engine, or if it's a reference to the 'LSx' term used by many GM enthusiasts to denote an LS-series engine. While the latter theory is entirely possible, the fact that the whole name is in capital letters suggests it could be something different. Currently, the Corvette Z06 uses the LS7 powerplant. Rumors have suggested a more powerful Corvette model will use an engine called LS9, fitted with a supercharged. Is it possible GM will instead use the name LSX? Perhaps a minor technicality to some, by Corvette fans will surely find this interesting.