I like playing that game - seeing an Indy actor in another movie and working out a bizarre plotline to prove that they are really their Indy character.
It works with Doctor Who, too.
Like... at some point during 'Robot', did the fourth Doctor ( still suffering from post-regeneration trauma ) head off in the Tardis and become corrupted by his darker side, growing himself a beard and then facing off against Sinbad?
Or did the second Doctor, during the hypothetical season 6B, become a priest and end up getting skewered by a falling cross, somehow crawling back to The Tardis and then regenerating into Pertwee?
Or perhaps the second Doctor went back to ancient Greece and grew old and blind, eventually meeting Jason during his quest for the Golden Fleece.