As opposed to what was believed before, Rygar is just a port of the PS2 game and not a brand new Wii game.
http://wii.ign.com/articles/803/803338p1.html
July 11, 2007 - Tecmo shocked everyone back in May with the announcement that Rygar would be coming to the Wii. Well, here's what was left out of that announcement. Project Rygar is, according to the latest issue of Famitsu, just an updated version of the PlayStation 2 Rygar game.Of course, Tecmo is adding some updates to the game. Famitsu provides a first look at the new Muscle Mode, which appears to be a battle mode that makes use of the Wiimote for direct controls. You have access to three special moves, achieved by swinging the Wiimote in different ways.
Outside of this new mode, the game will also see a redesigned main character, redesigned enemies, new monsters and new enemy positions. It's unclear if the main story mode will make use of direct controls, but hopefully Tecmo will be able to provide some clarification at E3.
Thanks to Blacksaber for the sig!