Not that anyone has been realistically been able to do that yet. The combination of athleticism, intelligence and financial acumen needed to get to that point almost precludes doing anything else, including sleep. But it's still theoretically within the realm of human achievement.
But the idea of "always be Batman" is appealing in an idealistic way. Always be heroic and powerful and smart and just. In that sense, you could substitute in just about any hero of your choosing.
And that's precisely what Amy Cuddy did in her TEDTalk about body language. Cuddy is a social psychologist who's research has suggested that your broader body language, like posture, impacts both how others perceive you and how your body acts at a chemical level. That by assuming "power poses" it affects your levels of testosterone and cortisol. In her TEDTalk, she shares both her research and some personal anecdotes about how it works. And, more relevant here, she sums up by suggesting people take some time out to pose like a superhero with your legs spread and your arms akimbo. The final slide of her presentation is Wonder Woman.
This is science, people. The most important thing in life is to be yourself. Unless you can be Wonder Woman. Always be Wonder Woman.