As for why they had not gone their separate ways, it was actually because the instant Deathstroke received the news, he realized he might not be as confident as he had thought. He had assumed that no matter the circumstances, he would be able to protect Joseph. But this situation was still a little too complicated.
First of all, if the plane could not land, the risk of a forced landing at sea was extremely high. Even if they survived landing on the water, there was no telling which group might abduct them, or whether there would be a risk of them being killed to silence the matter. Even if they landed safely at Hurghada Airport, there was a good chance they would be detained by the Egyptian authorities.
Deathstroke now regretted bitterly that he had never told Joseph about his profession. The title of the world's number one mercenary had real value, even more than the children of certain major powers' important figures. Because he could be made to act, and that meant he could do far more than simple ransom kidnapping.
If Joseph knew his identity, he would have an enormous bargaining chip. As long as he told those people his father was Deathstroke, they would definitely keep him alive. Even if those people had a grudge against Deathstroke, they absolutely would not kill Joseph lightly to get revenge. Because the benefits they could gain by assigning Deathstroke to work for them were too great.
Leaving aside anything else, and not counting that commission that had been fake from beginning to end, Deathstroke's mission completion rate so far was 100%. Every job he had taken had been completed. Even when his targets were important figures from developed nations, he had never missed. That black-and-yellow armor was synonymous with