Stephen Colbert and his guests Jimmy Fallon , Jimmy Kimmel , Seth Meyers and John Oliver made a “case for late night” on Colbert’s Late Show in a get-together to honor the departing CBS talk series before its final sign-off on May 21. (“Jon Stewart,” Colbert quipped, “is the designated survivor tonight – someone has to survive for the president to be mad at.”) “Wouldn’t it be great if Jon had to do all of our eulogies,” Colbert joked, with Kimmel, who was seated on the Late Show couch furthest from the host, responding, “I hope I don’t get stuck on last place in that one, too.” The reunion for the self-named “Strike Force Five” included plenty of well-wishes and good-natured jibes (“I figured out why you lost $40 million Stephen,” said Kimmel.…