Anait Games published correspondence from an anonymous former employee of GRIN's Barcelona studio, which closed unceremoniously before the main studio did in 2009. The anonymous party went on to identify two projects that were in the works before the closure: an update of Capcom's Strider and a Streets of Rage game.
The Strider game had 3D models and concept art, and even a teaser video -- which you can see above. Capcom canceled the project, and GRIN kept working on it, with the intention of changing out the IP. It was only after the failure to get this game picked up that the studio went ahead with Streets of Rage, of which we have yet to see any media.