Guitar Hero for the Nintendo DS?

(Photo not official)
"On January 19, 2008, video game developer/publisher Activision filed to protect the trademark Guitar Hero On Tour in relation to “computer game software and related instruction manual sold together as a unit; interactive video game programs; computer game cartridges; computer game discs; downloadable software for use in connection with computer games; video game controllers; Interactive video game comprised of a cartridge or DVD sold as a unit with a video game controller”." -trademork.com

Read more here.