Doyle, from Newcastle, was leading the world title race and seemed destined to be crowned world champion at the Australian event.

However, his title hopes were dashed when he was involved in a shocking crash in the penultimate round of the series at Torun in Poland. 

Doyle led the series into Torun after claiming three successive grand prix victories.

He was slammed into the protective barrier when British rider Chris Harris lost control of his bike and crashed in heat three. 

Doyle suffered a punctured lung and “shattered” elbow and has still not been given the all clear to travel back to Australia.

“I am unable to fly due to my lungs and have to wait for surgery on my elbow once my lungs are healed,” Doyle said from hospital.

“I would like to again thank everyone for their kind messages. I have got time to read them all! I will concentrate on my health and recovery to be ready for 2017.”

Fellow Novocastrian Masters, who rode as a wildcard entrant in the event last year, will join Australian riders Chris Holder and wildcard Brady Kurtz.

Masters made a sensational debut at senior international level lashing out at three-time world champion Nicki Pedersen and punching a mechanic.

The 25-year-old has had a productive year, riding for Australia in this year’s Speedway World Cup final in Manchester, breaking into the Swedish Elitserien league with Lejonen and helping Wolverhampton reach the British Elite League grand final.

Masters was runner-up in last year’s Australian title to Kurtz and was second the year before to Doyle.

“It’s not the best circumstances in which to get a GP place. Doyley looked as though he would go on and win the series, and every Australian was willing him to be crowned world champion,” Masters said.

“Now I hope I can go in there and enjoy the experience of being part of another grand prix.

“Last year was incredible and I think I took the experience from that into this season. When you are in that environment it gives you the drive to better yourself and hopefully another crack at it can kick me on again next year.

“I want to enjoy the occasion. It’s something I didn’t really think would happen again, certainly not this season, so I want to go in and perhaps be the spoiler on the night.

“No one will expect much anyway so I’ll soak up the atmosphere and enjoy it.”

Three-time world champion Greg Hancock, from America, lead the series and will take the title if he scores 11 points at Etihad Stadium.