Coming in after Kingdom, it shouldn't be THAT difficult to not muck this up. And I say that as someone who unashamedly loves anything Indy, even Kingdom of the Crystal Skull.
Have Harrison Ford as an affable, loveable, gruff adventurer with a heart of gold, get yourself a macguffin, throw in some baddies, brew up some nice action sequences and away you go. Especially in this era of actually putting passion into legacy projects, I'd be surprised if Dial is outright bad.