I am a self admitted Marvel fan. I have the Avengers Starter and have played a few small games. I LOVE this game! Great game mechanics. Great miniatures. Very cinematic. Lots of fun! I think Knight Models did a great job on this.
I don't play the Batman game. Not knocking it, but just not into it.
From reading on Dakka, I understand the Facebook Page and "Official Batman Forum" are run by fans, not Knight Models. Apparently they are overly protective and don't want "their" forum to be used to say anything they view as negative to the company or game.
But the game and miniatures are very cool. I play a lot of games, but I am very excited about this one! If you like Marvel Super Heroes, you owe it yourself to check out this game. I think you will be pleased.
Here is a link to a great blog that has a lot of great info on the game, so you can have a pretty good idea of whether you will like it before you buy.
http://pressganger.blogspot.co.uk/2014/11/useful-35mm-dc-marvel-and-batman-game.html