Well, as much as Dyon would like that to be true, the reality of the situation was that he was stuck here. Not only that, he was stuck here with many of the talents that were meant to be tasked with defending Earth's gate.
Lionel was here. Evelyn was here. He was here. Madeleine was here. Ri was here. His demon generals were here. Even worse, it was unlikely that Thor and Vidar would be participating in such a thing either considering the Ragnors would now be war criminals of the Belmont family.
Dyon couldn't save Zabia now and had to leave him in a coma-like state because he couldn't make the pill necessary to recover his talent without his soul. Ulu would be 3-4 months pregnant when the gates next opened, not to mention dead with 9 months.
Dyon didn't know it now, but the Shruti had left the universe, unwilling to deal with the fallout of the war the Ragnors started.