I don't have 2020 vision, but it's really unlikely that the new guy can be as successful as the extremely "unique" individual who built the company. The board of directors, who took control when he left, wouldn't allow it. They will basically choose someone just like them with the exception that this person is willing to take a greater risk, ie when something goes wrong they will be kicked out, for a better reward.
This is nothing like Steve Jobs who basically loved the game, he was very, very good at it but basically played to the game because he wanted to, the money was just the way of keeping score.
As for being successful enough; well there's a good reason the guy before him to left so he wasn't bought in to captain a sinking ship which probably means he will be successful because he'll be able to leave 'for personal reasons' before the ship hits the fan.