Now with only seats at Manor and Sauber available, Wehrlein appears to have his future secured.
"There's something new, but nothing new with a signature," he said.
As for Wehrlein's Manor seat, that is expected to go to Haas driver Esteban Gutierrez.
"What I can tell you is I've been working day and night for something definitive," he is quoted by the Spanish daily Marca in Abu Dhabi.
"We are focusing a lot of energy on it but so far there is nothing to announce. But there are good prospects and possibilities and I hope to share my plans soon," Gutierrez added.
Bahrain International Circuit - Winter testing