While Lethal Weapon 5 killing off Martin Riggs might seem like the easiest way to salvage the series, things are not that simple for the belated sequel. According to series star Mel Gibson, the Lethal Weapon franchise is on its way back to the big screen after a multi-decade absence. Gibson claimed that he was taking over directorial duties on the sequel after the passing of the late, great Richard Donner, and the actor said that the much-delayed final chapter in the Lethal Weapon franchise would likely start filming in 2023. However, the series faces an uphill struggle.

https://screenrant.com/lethal-weapon-5-kill-riggs-gibson-problem/