Pretty much, if they wanted to spin off or sequel, for how bad it was Crystal Skull gave them that opportunity
Drinker even points out you didn't need Shia to do it as you could have easily replaced him with another actor, the fact they went this route is to piss on the grave.
Indy was already a dead franchise. This is Disney saying, "I'll jump start your heart and kill you again."
Pretty much, if they wanted to spin off or sequel, for how bad it was Crystal Skull gave them that opportunity
Drinker even points out you didn't need Shia to do it as you could have easily replaced him with another actor, the fact they went this route is to piss on the grave.