I've had access to this game through PlayStation Plus service and have been pleasantly surprised by what it has to offer.
For staters you can spent a good amount of time personalising your own unique super hero/villain, equipped with a choice weapons and movements. Everything appears to be upgradeable depending on your experience within the game. Fighting and exploration depends on the choice you make at the start but my set up resulting in some interesting metal powers, e.g. levitation along with a pretty effective long staff.
Unlike the previous review I actually found the voice acting by familiar actors, (Mark Hamill as The Joker) to be pretty good. I'm not a massive comic book fan so many of the 'iconic' characters are new to me but there's certainly an impressive roster. During your character creation you get to pick a mentor from a handful of options, I chose Batman, which resulted in my character appearing in Gotham city rather than Metropolis or elsewhere. For the first real mission I was teamed with Batgirl to take out the Scarecrow which wasn't easy but was good fun.
I agree that the prospect of having to pay for this title on a monthly basis as well as full price upfront is a little off-putting but I'm new to the idea of MMOs so maybe I'll just have to get used to it, however it does stop me giving it 5 stars as other online only games such as Warhawk and SOCOM don't charge a monthly subscription.