Seven games have been announced as official selections, as per usual: Ultimate Marvel vs. Capcom 3, Super Street Fighter 4: Arcade Edition, Tekken Tag Tournament 2, Mortal Kombat, Street Fighter X Tekken (ver. 2013), King of Fighters XIII and Persona 4 Arena. The eighth game shakes up some paradigms, being selected through an ongoing charity fundraiser for the Breast Cancer Research Foundation.
Basically, players donate money to the BCRF in the name of whichever game they want to see in the final slot, be it Dead or Alive 5, Darkstalkers 3, Capcom vs. SNK 2, or any of the 13 other eligible titles. Whichever game's community raises the most money for charity before the end of this month will be selected as the final, official EVO 2013 selection.
Donation links can be found here, so if you want to forcefully subject people to a global MLP: Fighting Is Magic tournament, you can do so for a good cause.