[MarsHottentot]

Even though it's pretty obscure, Marvel's Captain Marvel had a time when he 'henshined' via the Nega-Bands from one character - former Hulk sidekick, Rick Jones - into Genis-Vell / Captain Marvel (who was mentally unstable, but that's another story). Sure, it was a riff / mocking of DC's better known original Billy Batson / Captain Marvel, but closer to what we're talking about here.

The most Toku character that I can think of is ROM, Space Knight. He's an alien in a cyborg body with crazy weaponry, fighting gross monsters known as 'Dire Wraiths' who hide among the human population. It was made to sell a the ROM toy (very Toku), but the series far outlived the sole action figure it was made to promote and has, in fact, been revived just recently by IDW comics. Marvel, despite losing the ROM license, tried to horn in on the Power Rangers craze with a failed Space Knights miniseries in the late 90's.

DC's last iteration of Blue Beetle was very Metal Hero.

Hasbro seem to be trying to create a cinematic universe ala Marvel, so expect a ROM movie at some point.