The instant he saw him, Dante knew that he was done for. He made a mistake. A very big one. A mistake that could have been avoided if only he had gone about things a different way.
He could have used 8-3 to grab Red Bull while he was focused on Rose and her crew. He could have opened a portal under Jason and finished the mission before it could even start. Instead, he had decided to let things play out—to let the rest of the crew complete their mission while he provided minimal assistance.
It was all intended to hide his involvement. To make it seem as if the whole thing was carried out by a small crew without any significant powers. All of that went out of the window when he let his anger take control, and when he came across that first Genome, all hope of ending things quietly was lost.
