Luigi is okay— Nintendo UK VS (@NintendoUKVS) August 8, 2018
Luigi sadly died in an accident during the filming of the most recent Nintendo Direct about the upcoming Super Smash Bros. Ultimate. Luigi was reprising one of his excellent roles as Scared Luigi (from the Luigi's Mansion series of games) when he had his soul removed from his body by the Grim Reaper, who was also hired by Nintendo to appear in the Direct.
The Grim Reaper claims it was an accident and blames his method acting for the mistake. Reaper has since been arrested and will be going to trial for manslaughter in the coming months.
Luigi's brother, Mario, has yet to make a statement or public appears since Luigi's passing. The brothers have starred in countless games together and have been a great influence on one another, so we all need to give Mario time to mourn.
Luigi's final Nintendo Direct announced that a lot of new things coming to Super Smash Bros. Ultimate. New features include characters, Simon Belmont and King K. Rool., Echo characters like Dark Samus and Richter Belmont, as well as 103 stages in total.
Luigi will be making his last appearance in a game this December 7th when Super Smash Bros. Ultimate will be released on the Switch.