I just watched the trailer for the new show Cosmos: A Space Time Oddessy, and Neil deGrasse Tyson should and needs to be in a Mass Effect game. In the trailer, particularly from 1:36 min on ward, he looks like the Elusive Man.
I can see him as some oracle parked in an outpost poised at the edge of a black hole's event horizon. You pull up in the Normandy with Joker at the helm. You select your squad and make your way into the station to listen to Neil deGrasse talk science, the universe, and death by black holes.