"This is a huge step in the right direction," Lonergan said from Las Vegas today.
"Three things have had to happen for us to fight Andy Ruiz for the world title - one, Tyson Fury has to be stripped, or he relinquish the belts, so that's one. Step two, Joshua - Anthony Joshua, has to sign to fight Wladimir Klitschko, that's coming up. Step three, we need to come up with an agreement with Bob Arum and Andy Ruiz. We're on our way."
Lonergan added: "I think Tyson Fury is looking to gain a little bit of favour and save the WBO a bit of drama by relinquishing the belts. [He is] trying to be a 'champion in recess' which means, should Joseph Parker beat Andy Ruiz, if we get that deal done, then Tyson Fury at some stage will be guaranteed his shot to get his belt back. It's a fight we'd be happy to have."
Parker, ranked No1 by the WBO below Fury, said from his Las Vegas base: "It's disappointing for Fury, he's been really good to me, and I hope he gets well soon, but it's an exciting opportunity which can't be ignored.
"I have my fingers crossed my promoters can stitch up a deal to bring the WBO world title to New Zealand."
Fury's decision, while not unexpected, is good news for the sport because it removes the risk of any legal action which could have put a halt to some big fights in a division going through unprecedented change.
Fury could have been stripped on the basis that he hasn't fought since his shock victory over Klitschko in Germany 11 months ago, but despite his mental health issues and the fact he isn't in a fit state to get in the ring, any decision by the WBO could have been subject to appeal.
"I feel that it is only fair and right and for the good of boxing to keep the titles active and allow the other contenders to fight for the vacant belts that I proudly won and held as the undefeated heavyweight champion of the world when I defeated the long-standing champion Wladimir Klitschko," Fury said in a statement.
"I won the titles in the ring and I believe that they should be lost in the ring, but I'm unable to defend at this time and I have taken the hard and emotional decision to now officially vacate my treasured world titles and wish the next in-line contenders all the very best as I now enter another big challenge in my life which I know, like against Klitschko, I will conquer."