DALLAS – With one decision, the Yankees’ world and personality were turned upside down.

They are no longer the bullying big brothers in town.

They no longer have one of the best hitters in the world who is on a clear path to the Hall of Fame.

You no longer have Plan A.

Juan Soto, who became increasingly popular in his first season in the Bronx, is no longer a Yankee but a Yankees villain.

Mark May 16 on your calendar for 2025 for its first return to Yankee Stadium.

He will be treated very differently than last time.

In a conclusion that seemed startling but wasn’t entirely surprising given the rival ownership, Soto left the Yankees but not New York, agreeing to a monstrous 15-year, $765 million deal with the Mets on Sunday night to open the winter meetings at the Hilton Anatole and be sure to tick off the Yankees.

According to the Post’s Jon Heyman, Hal Steinbrenner & Co. increased their offer several times, reaching a maximum of $760 million over 16 seasons, but Steve Cohen’s pockets were too deep to make the largest pact in baseball history .

The Yankees need to replace one of the most entertaining and best hitters in the game, one who worked with Aaron Judge to destroy opposing pitching during his one-year stint in the Bronx.

He led the league in runs scored, hit 41 home runs, posted a .989 OPS and only elevated his play in the postseason, putting the club three wins shy of a World Series title.

If the Yankees hoped Soto’s comfort in the stadium and clubhouse would prove an advantage, they were wrong.

With no one available anywhere near Soto’s quality, the Yankees’ Plan B needs to focus on quantity.

The club recently spoke with Max Fried and Corbin Burnes, the team’s top players.

If they can’t get two of the strongest batters in the world together to outwork their opponents, perhaps they can come up with a complement to Gerrit Cole to outwork their opponents.

Burnes, who will likely earn more than Fried, is expected to make over $200 million.

Arguably the second-best position player on the market is no longer available after Willy Adames agreed to a contract with the Giants.

The Yankees, with a need at third or second base, could target Alex Bregman – proven and talented but a foe of the 2017 Astros who is hated by the fan base and would be an odd fit in the clubhouse – or explore the trade market for someone like Nolan Arenado or Alec Bohm.

After declining Anthony Rizzo’s option, the Yankees are also looking for a first baseman and could retaliate against the Mets by swiping Pete Alonso.

Only Judge has hit more home runs than Alonso since 2019, but the 30-year-old is coming off a down season and is concerned about how stodgy first basemen age.

Other options here include Christian Walker, Paul Goldschmidt and Carlos Santana.

Without Soto and without a true centerfielder, the Yankees could probably use several outfielders.

Teoscar Hernandez and Anthony Santander are the most attractive free agents, and left winger Joc Pederson would love the stadium.

The center field market is bleak, which could prompt the club to strike a deal for the Cubs’ Cody Bellinger, who is owed $27.5 million next season.

Could a team that might not beat the other team instead try to smother them late in games?

How about adding back-end armies like Tanner Scott and Jeff Hoffman after losing Clay Holmes and Tommy Kahnle?

When the Yankees lost the bid for Robinson Cano after the 2013 season, they funneled the money to Carlos Beltran, Jacoby Ellsbury, Brian McCann and Masahiro Tanaka – a $458 million sum that included hits and costly misses and zero championships.

A theoretical version this winter could include Burnes, Bregman, Alonso, Santander, Bellinger and Scott for a total of around $650 million – or more than $100 million less than Soto.

The Yankees have options, heartache, certainly, and a few new nemeses – a superstar who seemed at home in the Bronx but will call another borough home, and a rival who has described himself as the most intimidating financial force in sports .