Williams technical head Pat Symonds has welcomed news that, "against all the odds", it appears as if Manor will race in Australia.
The backmarker outfit missed the last three races of the 2014 season when the team went into administration because of financial problems.
Manor, though, was revived last month, reportedly with the financial backing of Stephen Fitzpatrick and the involvement of former Sainsbury boss Justin King.
The team has already announced Will Stevens as one of its drivers while last week the FIA confirmed Manor Marussia's entry into the 2015 Championship.
"I am so pleased. I think it's great to see them back," Symonds told Reuters.
"John (Booth) and Graeme (Lowdon) are two great guys, real racers. I started 35 years ago at Toleman and Toleman was not as professional as Marussia.
"But the seed of that team produced Benetton and Renault and now Lotus. (Designer) Rory Byrne, all his wins, my career. There is such a place for teams like that, they are so important to the sport."
He added: "Against all the odds it looks like they are going to be in Melbourne, which is fantastic."