One of the most intriguing components of evolution in the Mortal Kombat franchise has been the DLC packs. It makes sense the series would incorporate downloadable content into its framework. Many other properties are doing so, maxing out business opportunities as it's — let's be honest — an easy way to keep milking the fan base for money.
Source：https://www.cbr.com/mk1-dlc-needs-a-ufc-crossover/
