Selome Hailu Kevin Costner and 44 Blue Productions have partnered to develop “Onward,” an anthology docuseries about traditions and rituals in Indigenous communities around the world, Variety has learned exclusively.Each episode of “Onward” focuses on a specific Indigenous community and how their people, land and cultures have endured existential threats such as climate change, commercial development and the pandemic.The concept for “Onward” is based on Cale Glendening’s documentary short of the same name, which chronicled his time embedded with Kazakh-Mongolia eagle hunters in the remote Altai Mountains of Mongolia. Glendening writes and directs the series, as well as executive produces alongside Costner, Monitor & Merrimack Pictures’ Glenn Kleczkowski and Mark Gillard.