The latest hiatus for the “One Chicago” shows has been excruciating, especially for “Chicago Fire” fans. It turns out that there will be a “Chicago Med” cameo that could hint that someone is going to die. During the Flashback Weekend in Chicago, Steven Weber, who plays Dr. Dean Archer on “Chicago Med” let it slip that there will be another crossover moment. NBC CHICAGO MED — “Heaven Help Us” Episode 1121 — Pictured: (l-r) Steven Weber as Dr. Dean Archer, Luke Mitchell as Dr. Mitch Ripley — (Photo by: Peter Gordon/NBC)The big question for many is why Archer would even be in “Chicago Fire.” Does This ‘Chicago Med’ Cameo Mean a Death?