I really like dunkelzahns last will. But the bountys are an issue. As GM you could prevent your group from getting them alive. You could intercept the transportation by UCAS / KA / Runners / what ever. Or your Johnson could give them a contract to catch one, and only paying them X. If the J plays nice, my group would respect such a contract. Or you could make them pay a good amount of money by destroying their cars or cast a high level (edge) pulse spell on them. They get 1.000.000 but they lose myb a cyberdeck, all the weapons, the car and so on.
On the other hand, i would love to find with one of my chars the information about the mars pictures. 1% of ares is a nice award. My char would be done, he would quit shadowrunning, i would never play him again, but i would know that he is happy and very rich

And i would really like to play a campaign to get that information. The perfect finish for a high karma (400-500) shadowrunner. Do or die. High risk high reward. It would be a great last big bang!