[@Ruby]As a fan of Super Sentai at least, I kind of think if you try and make it "realistic" you end up losing basically everything that makes it... Well, what it is. ^^;

Closest thing to a "realistic" series like that would be Go-Busters (which unfortunately isn't getting a Power Rangers adaptation due to [i]low toy sales in Japan[/i] >:\ ), and even then that's kind of... A bit wacky. XD