To me Indiana Jones had two paths it shoudl have taken.
1, End it at the trilogy
2. Make it like bond, where the actor changes and they continue the story (every 3-4 years or so a new one). There is so much that could have been told in the Indiana Jones universe.
But no they left the franchise dead for a couple decades or so to revive it for a weird move with Harrison Ford than again 10 year gap with Harrison Ford. They essentially put themselves in a hard spot where Harrison Ford is Indiana Jones.
So the only options now is, end the series, continue it with a new character not names indy, or reboot as it would be weird changing actors at this point considering indy is old now.