I guess it depends on how much stake of the network Steemit currently owns and those stakeholders that would follow Sun's marketing for chain changes. If it's enough to elect super majority of witnesses he could do whatever he wants to our base chain.
I was thinking about it like they purchase SteemIt Inc. The company, and some portion of the stake that would go with that.
In that position they could keep the team or not and add marketing and resources.
Yeah my biggest question would be how much stake is going to them. Not sure it would matter as a lot of users would likely kowtow to his influence regardless if he's the new 'boss'.