I don't think it's fair to interrupt a fatality. Reminds me too much of Ultra Breaker moves in KI2. Team fatalities sound cool, but I hope it doesn't look too much like Marvel vs. Capcom. If they do team fatalities, they should only be able to be done in a team.

But wouldnt it be great if a friend of yours is luaghing becuase hes gonna finish you and you interupt it and whipe that smile of his face that would be cool...and i think its most certain that there will be a tag team mode and it would be cool if chars like jax and sony had team fatalz but some charz dont really have partners like scorpion and they could do something like this
if you go Arcade mode and you dont finish a char he could come back and have like revenge but unannouced for example you have fought sony but you didnt finsh hhere then you face jax you win and then sonya comes 2 avange him but if you had finished here she wouldnt come back you know i think fatals should be a bigger part in the game