Cappadocius:
Most, if not all, superhero systems let you do anything you want
Sure... but the difference is normally in how much effort you need to put in for that result. Marvel Heroic is, in my experience, far more fluid about allowing characters of wildly different power levels, and allows stunts and creative use of powers with relatively little effort, compared to Mutants & Masterminds (which tends to slow things down with requirements like knowing how big/heavy/far things are, power points and alternate effects, and the general heaviness of the system overall).
I'm not interested unless this uses the Marvel Heroic rules - it's my go-to supers game, to the point where I don't care to go back to other supers games I've used in the past (such as Mutants & Masterminds).