I think they will way the possibility of maintaining control through developers choosing their implementation over one the other engines choose to user. If they

I think they will way the possibility of maintaining control through developers choosing their implementation over one the other engines choose to user. If they see a chance for developers to pick their standard they'll push it, if not they'll back off and adopt the other one. It can be seen in the history of the engines, and will continue that way. Like evolution of standards, the most awesome ones according to developers live, the others die.