This is what Diablo 3 should have been.
Game is pretty damn good. You REALLY need to get out the starting area, and get a few levels to see what it has to offer. They did a bad job of not giving you the full gambit of what is in the game with the starting area. The enemies vary like any point click as you advance, more so in this game. The environments, while not fully destructible, you can bust up a TON of shit. The Hulk running jumping past you and taking out...everything, is fun to see. Thor or Storm calling down lightning strikes, that take out the windows is nice.
They did a great job on the small things. Like if I play Thor, and couple more Avengers pass each other, Captain America will say the "Avengers Assemble!" thing. And it isn't cheesy.
Even the "crappy" characters like Hawkeye and Daredevil are pretty damn fun. Yes you see a bazillion Wolverines, and Deadpools...you do see Rocket Racoon a whole bunch because he IS fun to play.
They have a very satisfying loot table, with playable character drops, and retcons, (respecs) gear etc, bringing much replay value even after you have seen the story. Crafting is meh, but you get some useful items from what I have seen.
As for getting burned on lifetime subs, it is free to play. Think League of Legends as far as the pricing model goes. Your 200 gets you all the characters and out fits as of right now. Though future content you will need to pay for from I read. That being said, they are missing the boat on a 100 dollar pricing model. Going from 60 to 200 bucks is a huge jump for people. I've gone back and forth on it a couple times with just the THOUGHT of paying 180 bucks on a video game. Knawmean?
Bad side. No different story arcs. I'm sick of clobbering time...The same old point click model problems. Range is safe, mele dies.
Some sort of an AH, even it was gear for gear would have been nice. Balance is an issue obviously with this many characters. The Thing is made to tank. Thor can tank? But you rather The Hulk.
Overall, I like thios MUCH more than D3 (Not that hard really), and any point click outside D2 to date.