While you can't fight Batman in MK11, you can fight The Joker (DLC). Plus, the PC version of MK11 is frequently updated and goes on sale for under $10. Add the "Aftermath" expansion for a massive single-player story.
While Mortal Kombat vs. DC Universe is no longer available for purchase on modern PC stores, it is still possible to get the game for free through various online platforms. Several websites offer free downloads of the game, but be cautious when using these sources, as they may pose a risk to your computer's security. mortal kombat vs dc universe for pc free