[email protected] event is starting to take shape, with several studios and networks jumping in to bring their shows and movies into fans’ living rooms with almost entirely prerecorded panels.AMC is hosting presentations for its “Walking Dead” universe and “NOS4A2,” while Disney is prepping 11 different panels, including a career retrospective on Nathan Fillion, who stars on ABC’s “The Rookie.” And Disney+ will make its Comic-Con debut with three virtual Q&As, including one for Nat Geo’s “The