What's next for Renault?

After the news today about Ricciardo announcing he will be signing with McLaren, Renault has an open seat. Lots of F1 fans have expressed their opinion through social media hoping that Nico Hulkenburg or Fernando Alonso will return with Renault but with the team having a considerable drivers academy, will they take their chances with the youth? Test driver Guanyu Zhou and F2 driver Christian Lundgaard are options from the academy.

Who do you think should get the seat?