According to HN Entertainment some of Lionsgate’s 2020-2021 releases include the new Chris Rock-produced Saw reboot, Doug Liman’s Choas Walking, Ryan Reynolds’ The Hitman’s Bodyguard’s Wife, and Keanu Reeve’s John Wick: Chapter 4/Rally Car. There also is an expectation that Sly Stallone’s The Expendables 4 and Chris Evans’ Jeykell will eventually be released by 2021. Lionsgate and Chad Stahelski were developing a feature film reboot of Highlander, but it remains to be seen if that project will be part of the deal.
Assuming that Lionsgate remains consistent with an August release in 2021 which is 2 years away, there is no wonder why filming has not yet started. I suppose there is plenty of time, but the only problem is that the main cast is not getting any younger!!