When WWE comes back home for WrestleMania next year, someone else will be spending a night in their house.

Ring of Honor and New Japan Pro-Wrestling announced Thursday it will host the “G1 Supercard” on April 6, 2019, at Madison Square Garden, the night before WrestleMania at MetLife Stadium. The show, which will feature wrestlers from both companies, will go head-to-head against WWE’s “NXT TakeOver” at Barclays Center that night. It will be the first time the buildings will host wrestling shows up against each other.

Ring of Honor COO Joe Koff told The Post that the Garden is the “next place we should be playing” after running its “Supercard of Honor” pay-per-view in 4,000-6,000 seat venues the past two years near the site of WrestleMania.

After seeing “All In,” an independently promoted and funded show by wrestlers Cody Rhodes and the Young Bucks sell out the 10,000-seat Sears Centre in the Chicago area for Sept. 1, a building the size of MSG seemed like a viable next step for Ring of Honor. The Garden can hold 18,500-plus fans for wrestling.

“It certainly changed the landscape in the thinking of what is is possible and I think in this world of possibility I think they really clearly illuminated what is a possible,” Koff told The Post in a phone interview. “I think if there was ‘All In’ or not, because of the weekend and what it represents, and our involvement always in that weekend, we probably would have thought a little more cautiously about the size of the crown. [‘All In’] certainly didn’t hurt.”

Ring of Honor and New Japan’s show at the Garden originally appeared like it might not happen after Koff claimed in June that the Garden was backing out after communication with WWE, which had held a stranglehold on the building as far as wrestling shows are concerned. Ring of Honor and New Japan have grown into the most popular alternatives to WWE.

“MSG is, of course, free to work with ROH [Ring of Honor] however they want,” WWE said.

The Garden declined comment on Koff’s remarks and the process of bringing the “G1 Supercard” to the building. Whatever caused the change, the show is now happening.

“I think that’s a question better asked of Madison Square Garden because we were very aggressive in wanting that date and we thought we had that date, but we did what we had to do as a business,” Koff said. “[MSG] did what they had to do as a business and I guess all of a sudden there was a phone call and we were able to work it out. … That’s probably their story to tell because they made the call [to us] and said let’s get on the phone and see if we can work this out. They wanted us. They knew that we would be good promotion. I think they were just looking for a satisfactory outcome for all parties.”

Koff said Ring of Honor and WWE had no contact throughout the process of landing “G1 SuperCard” at MSG. When asked if there was anything legal that needed to be worked out with regards to the show he said, “there was correspondence that was going back and forth” between Ring of Honor and the Garden along with the phone calls.

“We are thrilled to welcome Ring of Honor Wrestling and New Japan Pro-Wrestling to Madison Square Garden for the much anticipated G1 Supercard,” said Joel Fisher, executive vice president, MSG Marquee Events in a press release. “We expect April 6th to be another memorable night of wrestling at The World’s Most Famous Arena.”

Madison Square Garden has long been considered the base of operations and recognized home dating back to the 1950s when WWE CEO and Chairman Vince McMahon’s father, Vince Sr., was running WWF shows at the World’s Most Famous Area.

The Garden has hosted three WrestleManias, including the first in 1985, but WWE has not had a pay-per-view there since Survivor Series in 2011 and a “Monday Night Raw” since 2009 because of expensive broadcasting fees, according to ESPN. The company did air a WWE Network special from MSG in 2015.

WWE still hosts live events there, including last weekend when Ronda Rousey made her MSG debut and The Undertaker wrestled there for the first time in eight years. WWE, however, will hold SummerSlam at Barclays Center for the fourth straight year on Aug. 19, long with “Monday Night Raw” and “SmackDown Live” the following two nights.

“It’s just a wonderful relationship with MSG,” John Saboor, WWE’s executive vice president of special events, said last summer when asked about the company’s relationship with the Garden. “Our live-event staff is looking at every venue in the tri-state area as we place our major events, our major annual events, our television events, our non-television events. I know there is a constant dialogue with what is a wonderful leadership team at MSG.”

Ring of Honor having a show at Madison Square Garden is a major step in the company’s rapid growth — after having the best year in its history in 2017 behind the momentum of Rhodes and the Bullet Club — and New Japan’s continued attempts to make inroads into the United States. New Japan recently opened a dojo in Los Angeles and is coming off working a major show at the famed Cow Palace in San Francisco.

Koff still sees landing at MSG coming from circumstance and necessity more than anything, saying there are not many options for 6,000-8,000 seat venues in the New York/New Jersey area.

“It came down to this is where it [WrestleMania] was,” Koff said. “This could be a whole different conversation if it were in Boston or Chicago. This is the site that was chosen for that big weekend and then we had to look for buildings to accommodate what we think would be the best opportunity for our business and for our fans.”

Koff thanks the Garden for honoring the date and believes a potential return there will be based of how well they do April 6.

“If it works for both parties and it makes sense for both parties, I wouldn’t see why if we get the sellout that I’m hoping and anticipating we’re gonna get why they wouldn’t want us back,” Koff said.