Should I buy (Xbox One) Mortal Kombat X or Batman Arkham Knight?

Never played either franchise before (except for IOS MKX which was meh...) Im looking for something fun and will be entertaining for like at least 3-5

Never played either franchise before (except for IOS MKX which was meh...) Im looking for something fun and will be entertaining for like at least 3-5 more months. I am worried that both games might get boring fast. Please help! Thanks.

or:Never played either franchise before (except for IOS MKX which was meh...) Im looking for something fun and will be entertaining for like at least 3-5 more months. I am worried that both games might get boring fast. Please help! Thanks.

or:Mortal Kombat of course!

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