It’s still early game and they will say anything to get the most fans to buy the base game. I wouldn’t be surprised if a golden or royal like edition gets mentioned in a year. The only way I would consider something like that is it was presented as an upgrade and not paid at full price
Some people have speculated that they are planning another game with the female main character. That could be an interesting way to market but I guess it depends on how well the current title sells