To worry about a RS at this point makes as much sense as worrying about being hit by a falling meteor. WL has retired old stock structure before so it's not new to him. A merger with another corp (which is more likely ) will change the SS. There is also a RM model that simply abandons the old corporate SS. In short there are many ways to deal with SS.
Besides that, WL has publically stated both verbally and in text "no RS", and so would be lible in a situation in a RS wqhere we lost money.