well
I think its just about done:
http://www.autosport.com/news/report.php/id/121722

Back with renault and they will be paying more for them and lose part of the the renault and total sponsorship money in 2016 and all from 2017.
Plus a likely rebranding of the engine (probably to infiniti) although i think it only helps renault to have an additional team with its name on the cars
Contracts have been exchanged and the decision now rests with mattershitz...who would be wise it eat some humble pie and accept it