Be careful! Major spoilers ahead if you have not seen the latest Rebels episode Twin Suns1.
During this episode
Obi-Wan kills Darth Maul
and as a consequence Ezra says to his friends back at Chopper base:
We won't be seeing Maul again.
This is of course true, but how could Ezra know this? He left Obi-Wan and Maul before the fight. Yes, he took his ship, but this does not mean that
Maul could not leave the planet with another ship, given that he survived the fight with Obi-Wan.
Have I missed something obvious on screen?