Think about this: Since the Islanders’ new owners took control just over three years ago, they have amicably parted ways with an embedded, complacent and unsuccessful front office; filled the void by hiring one of the most successful executives in New York-area sports history; hired a coach just months after he won a Stanley Cup; and fielded a team that reacted to their all-world captain ditching them in free agency by winning just the club’s second postseason series in 26 years.

And now?

Now, that ownership group, flush with Scott Malkin’s money and deftly led by Jon Ledecky, has done what was once thought impossible — they have navigated the gator-infested swamp of New York politics and are on the verge of finally building the Islanders the state-of-the-art arena every pro sports team in this town deserves.

It has been a brilliant public-relations campaign headed by Ledecky — who, with funds from his New York Arena Partners group that is also partially funded by the Mets’ Sterling Equities, got Gov. Andrew Cuomo to approve the new LIRR station at Belmont. It will be Long Island’s first full-service train station built since 1933. The plan also scaled down the size of the retail space by about 20 percent after some surrounding neighborhoods showed concern about congestion — and still do.

But it sure seems like by the end of July, the Empire State Development board will give the full-go for the project, and shovels will be in the ground soon thereafter. For a franchise that has left a generation of fans bruised and bloodied, inspiring far more skepticism than loyalty, this is a monumental moment.

Which brings us back to the present, to that aforementioned executive, Lou Lamoriello, who has had an underwhelming summer thus far after his team played over its talent level before getting swept in the second round by the Hurricanes.

Lamoriello seemingly bungled the negotiations with goalie Robin Lehner — the Vezina Trophy finalist who continued his tour of candidness by exposing the ultimatum he was given from Lamoriello: Sign now or forever hold your peace. That one left everyone around the league scratching their heads, as Lehner went to sign an extremely modest one-year, $5 million deal with the Blackhawks.

Lehner is a guy who just entirely turned his personal and professional life around, and he couldn’t get another few days to consider his future? And that was because Lamoriello was so enamored with the idea of Semyon Varlamov mentoring fellow Russian goalie Ilya Sorokin — the 23-year-old netminder still in the KHL for at least one more season — that he drastically overpaid the slumping Varlamov to the tune of a four-year, $20 million deal? Yikes.

Lest we forget Lamoriello also struck out on the summer’s biggest prize, Artemi Panarin, who appeared to play the Islanders — along with the Panthers and Blue Jackets — to eke out as much money as possible from the Rangers, the team he seemingly wanted to sign with from the beginning. Now Lamoriello is going to have to watch Panarin ply his trade in Manhattan for the next seven years, knowing the Islanders’ money was never good enough.

Credit is due for Lamoriello getting three of his core pieces from this past season — captain Anders Lee, along with forwards Brock Nelson and Jordan Eberle — to all sign relatively team-friendly deals. But a roster that lacked top-tier talent behind Mat Barzal remains exactly that. Even the possible trade of defenseman Nick Leddy before training camp in September won’t result in the windfall the team needs to contend this season.

This was always considered a long-term plan, a work in progress. The aforementioned coach, Barry Trotz, deservedly won the Jack Adams Award in his first year behind the bench. And he might be unable to keep the squad from taking a step back this year.

But now the timeline is set. By the time the Islanders move into their new digs in 2021-22 — assuming there isn’t a lockout — they will need to consistently win to keep the people coming.

The Islanders are once again a big league team. Sooner rather than later, it will be on them to meet those expectations.