When Jeff ..., I felt that he and I were kindred spirits. Scary, huh?
Horrifying.
And if identifying with Jeff ever happens again, I suggest you seek immediate medical attention!
No one ever had the thought that Lang himself could be reanimated. That's just how popular a guy he was.
But if one thinks about it, it's probably not surprising no one thought to try the experiment on Lang. At this point they believe both the living person's life-force and their personality will occupy the body, so they'd believe that the personality of the person they'd use to reanimate Lang would override Lang's personality, and that would be of no use. And by the time they realize both could live, they no longer need Lang's help, so what point would there be to bring him back? And there would also be no guarantee that both would live. That certainly wasn't the case when they did the experiment with Eve. The possibility that both participants could live, as in the case of Barnabas/Adam, may have been so infinitesimally small that that's why Lang didn't even mention it as a possible outcome until his dying breaths.