The Block has released a nail-biting trailer ahead of its grand finale.

On Sunday, host Scott Cam and the hit renovation show took to Instagram with a joint post to promote the final episode, where the winning team will be announced.

Shots of the luxurious holiday homes that the contestants have built and remodelled are seen.

‘Our Phillip Island resort gets its big day… the auction is finally here,’ Cam, 61, says in the clip’s voiceover.

The music then shifts to dramatic motifs as shots of hosts Shelley Craft and Cam looking shocked appear.

‘That’s never happened before ever! What’s going on?’ Cam is heard saying, before he is taken aback by something.

‘Uh, hello? What the hell?’ he says, before the trailer ends.

It comes as The Block’s most controversial bidder Adrian ‘Mr Lambo’ Portelli has sparked a wave of speculation by hinting that he might be departing from the show for good.

The Block has released a nail-biting trailer ahead of its grand finale. Pictured: Scott Cam

On Sunday, the hit renovation show took to Instagram with a post to promote the final episode, where the winning team will be announced. Pictured: Shelley Craft

Portelli, 35, shared a cryptic caption with his followers, stating, ‘It’s time to say goodbye to The Block and this Dummy Bidder is going out with a f**kng Bang!’

The entrepreneur’s post immediately ignited speculation among fans, with one follower asking, ‘Goodbye to The Block? Is this your last season as a bidder?’

The ambiguous message left many wondering if Portelli’s days as The Block’s most controversial buyer are numbered.

Shots of the luxurious holiday homes that the contestants have built and remodelled are seen. ‘Our Phillip Island resort gets its big day…the auction is finally here,’ Cam, 61, says in the clip’s voiceover

On Saturday, the rich lister arrived at The Block’s Phillip Island site for the much-anticipated auction day.

The reality show’s cast and crew mingled with potential buyers of this season’s five new holiday homes, adding to the excitement on-site.

Portelli, with his usual confidence, appeared to be in a celebratory mood—at one point embracing 2024 contestants Maddy and Charlotte, who recently stepped in as contestants following the departure of Jessie and Paige.

The music then shifts to dramatic motifs as shots of hosts Shelley Craft and Cam looking shocked appear. ‘That’s never happened before ever! What’s going on?’ Cam is heard saying, before he is taken aback by something. ‘Uh, hello? What the hell?’ he says, before the trailer ends

While it is unclear who secured his bid, Adrian looked chuffed with his purchases and flashed a huge smile while filming scenes for the Channel Nine show.

At one moment, he was spotted celebrating with 2024 contestants Maddy and Charlotte as he happily embraced the reality renovators.

The sisters were a late addition to the series, moving in to take over work on House One after Jessie and Paige exited the show.

It is not known whose property, or how many homes, Adrian snapped up at the auction. That and the series’ winner are set to be revealed in Sunday’s episode.

It comes as The Block’s most controversial bidder Adrian ‘Mr Lambo’ Portelli has sparked a wave of speculation by hinting that he might be departing from the show for good. Pictured

Recent Block season finales have essentially been a two-horse race, as Portelli and fellow multi-millionaire businessman Danny Wallis fought to out bid each other over several properties.

Between them, the cashed up pair have purchased 15 Block properties in recent years.

In 2023, Wallis went home with nothing as Portelli snapped up three of the houses for a total of $12.4million. That included Steph and Gian’s home, which he bought for $5m, although it had a $3.35m reserve.

Portelli’s departure from The Block could spell and end to the record-breaking profits he has raked in for contestants, including Steph and Gian, who walked away with 1.65million from their sale and an additional $100,000 in prize money.