After watching ‘Visions and Voices’, it now exists in canon that Maul knows Obi Wan Kenobi lives and is on Tatooine. The two ‘known’ remaining Jedi also know that Obi Wan lives but only know that it is on a desert planet with two suns. They have made it their mission now to find Master Kenobi before Maul does to warn him. I can’t imagine that if they planned on having a Obi Wan Kenobi spin-off film, they wouldn’t have wanted to use this plot point (Maul vs Kenobi Part 2) in the film. With the third Star Wars spinoff not happening for years, this will either happen on Rebels or Maul will never reach his goal of finding Kenobi.

Sorry, I had to put that all in one paragraph to avoid spoilers.