Not a fantastic game and could have been a lot better but fine for a MK game. Nothing really innovative and the gore has been tamed down past the point of enjoyable I think but I was expecting that with Warner (DC) involved.
In response to the reviewer "studlyswede", why were you expecting bigger names such as the Hulk, Wolverine and others that you listed? I only ask as this game is MK vs DC, that means it is characters from the Mortal Kombat Universe and from the DC comics universe, not Marvel comics which most of the other characters you listed were from. If anyone is expecting characters from different companies in this game then I'm afraid you're always going to be disappointed.
If you like beatemups then there are better games out there, you only have to look. It's fun to play with and against the DC characters but the novelty will wear off quickly. Rent it and decide for yourself.