We already know a lot about Elton John. Anyone who hasn’t followed at least some of the ups and downs of his 50-year-plus career as they happened can easily get the gist from the 2019 musical biopic “Rocketman” or his fascinating autobiography, “Me,” or untold thousands of interviews and articles.

Now, there’s even more of “me”: the new Disney+ documentary “Never Too Late,” which had its world premiere Friday night at the Toronto International Film Festival and will have a limited run in theaters beginning Nov. 15.

Elton, now 77, teared up as he spoke about the film to the audience. “I’m having the best time of my life – except this fucking eye. I wish I could see you,” he cracked, who revealed earlier this week that he’s recovering from a “severe eye infection” that’s left him with limited vision.

Co-directed by his manager and husband David Furnish...