Val Kilmer wanted this as well. He had already had his voice recreated in AI for a previous movie so that he could continue to communicate with the audience in a way that felt more authentic to him (his "real" voice, not his voice while he was battling throat cancer).
“His family kept saying how important they thought the movie was and that Val really wanted to be a part of this,” says Coerte Voorhees. “He really thought it was important story that he wanted his name on.
“As human beings, the ability to communicate is the core of our existence and the side effects from throat cancer have made it difficult for others to understand me,” he added. “The chance to narrate my story, in a voice that feels authentic and familiar, is an incredibly special gift.”
Also, the director said that recasting would have been his preference but wouldn't be feasible for them as they don't have the budget to refilm the scenes with all the other actors.
Ya'll are bordering on disrespecting the wishes of a dead man.



The Queen of Shitty Robots herself designed a chair for exactly this purpose!
youtube short
longer vid on invidious
edit: i believe it's out of kickstarter now.