AusGamers has a hands-on preview of Mortal Kombat Vs DC Universe up and makes a good point. By including the Warner Bros Owned CD Universe, Batman or no Batman, they've removed one of the most endearing and best loved features of the series - it's gore!
From the preview:
"Mortal Kombat is about gore! – it's the bloodless MKII on SNES argument all over again. :("