Following in the wake of successful series The Walking Dead and Fear the Walking Dead, a third series/second spinoff is in the works. The untitled show already has a 10-episode order from parent network AMC and is expected to go into production this summer for a debut sometime next year. So for the TWD faithful, it sounds like you might just have new post-apocalyptic content to keep you occupied year-round, or close to it. As TV Line reports, the new series is a co-creation of Scott M. Gimple and writer Matthew Negrete, who will serve …