Nuno, whose side travel to Chelsea tomorrow night (6pm), has recently welcomed the Spaniard back to parts of group sessions at Compton.
The 26-year-old injured his anterior cruciate ligament last August and required surgery, but now he is in the final stages of his recovery.
"He's close, he's closer. He's been working with us," said Nuno on Jonny's condition.
"Not all the situations, but it's all according to plan.
"He's travelling to have an opinion from the surgeon and after that, I'm positive in a couple weeks more he will be ready to go."
It is a welcome boost for Nuno, who has also bolstered his squad with the signing of striker Willian Jose.
Wolves are still waiting for the Brazilian's work permit to be confirmed, making him unlikely to feature at Stamford Bridge.
But Nuno said on the striker: "It's just a matter of time and everything will be OK.
"We are just waiting for the work permit as that gives you an exception on quarantine, as long he tests negative in Spain.
"We are pleased because I think he can help us and bring things to the team.
"He's a different player than what we already have. He has experience and is a finisher, a scorer. He can really help the team."
When asked if Jose's arrival could open the door to Patrick Cutrone to return to Italy again – amid talks between Wolves and Udinese over a loan – Nuno added: "No, we are not looking at that situation.
"Patrick, we recalled him like everybody knows. He had his moments and his chances, and he's working. He's part of the group."
Meanwhile, Wolves have loaned young wing-back Ryan Giles out to Rotherham for the rest of the 2020/21 season.
He heads there shortly after being recalled from fellow Championship side Coventry.