I Came Across it while looking for ROMs
omg its so glitchy its funny (Because of one Minor... Very Minor bug... But even tho its Minor it effects the game in a Very Big way)

YOU CAN DO FATALITIES ANYTIME YOU WANT, and if u set up ur Emulator just right u can perform some pretty neat glitches (Honest to god theres quite a few with subby because of Deep Freeze (2 Part Fatal))

since u can do fatalities anytime that also means u can perform fatalities on Kintaro AND Shao Kahn
(However it seems like Jax is REALLY Shao Kahn because when u Deep Freeze Kahn his Sprite turns into the Deep Frozen version of Jax) heh...

and on even some cases u can do two fatals on the same opponent and even bring back the fighter u just killed (depends what fatality u did tho...)

Think of all the Possibilities that are possible with this Beta, Im not sure if TUG2 would work on it tho... i cant do it, But however if somebody knows how to do TUG2 and gets their hands on the Beta, they could try it and see if it works.. and if it does we will have Virtually Endless Fatality possibilities.