According to simulations run on different futures of Ignis and humanity, Revolver says that Lightning's is the only one that leads to mutual destruction.
All right!  If this attack 
succeeds, Revolver wins!
Jawoll! Wenn dieser Angriff gelingt,
hat Revolver gewonnen!
¡Si el ataque funciona, ganará él!
Certo! Se o ataque
funcionar, o Revolver vence!