CHICAGO -- The Bears unveiled a nearly $5 billion proposal Wednesday for an enclosed stadium next door to their current home at Soldier Field as part of a major project that would transform the city's lakefront, and they are asking for public funding to help make it happen.

The plan calls for $3.2 billion for the new stadium plus an additional $1.5 billion in infrastructure. The team and the city said the project would add green and open space while improving access to the city's Museum Campus and could also include a publicly owned hotel.

"This is not an easy project, but Chicago doesn't like it easy," Bears president Kevin Warren said.

The process, the vision and the steps that need to be taken to build a #StadiumForChicago

Chicago Bears (@ChicagoBears) April 24, 2024

The announcement at Soldier Field comes during a busy week for the Bears. They are expected to take 2022 Heisman Trophy winner Caleb Williams with the No. 1 pick in the draft Thursday night and bank on the USC quarterback to solidify a position that has long been a sore spot for the founding NFL franchise.

The team said last month that it was prepared to provide more than $2 billion in funding toward a publicly owned stadium in the city.

The proposal calls for $2.025 billion from the Bears, $300 million from an NFL loan and $900 million in bonds from the Illinois Sports Facilities Authority. The funding from the ISFA would involve extending bonds of the existing 2% hotel tax.

The Bears said the project would generate $8 billion in economic impact for the region. It would be built in three phases, and construction would take up to five years. The new stadium would be constructed on a parking lot just south of Soldier Field, the Bears' home since 1971. The team's lease at the 100-year-old stadium runs through 2033.

Mayor Brandon Johnson gave a full-throated endorsement, saying the project is in line with Daniel Burnham's "Plan of Chicago." He said there would be no tax hikes or new taxes for Chicago residents.

Renderings show the Bears' stadium would have a translucent roof and massive glass panels that would bring in sunlight and allow for views of Chicago's famed skyline. The plan is to host major concerts throughout the year as well as Super Bowls, Final Fours and Big Ten championship games.

Although Soldier Field's famed colonnades would be preserved, the spaceship-like stadium that was installed in the renovation two decades ago would be torn out and replaced by playing fields and park space. The plan calls for a pedestrian mall, food and beverage options, a promenade, and a plaza.

"My administration insisted that any new project -- especially one on public land -- must deliver strong public benefit and public use for the City of Chicago, and I am pleased today that this plan does exactly that," Johnson said.

Illinois Gov. J.B. Pritzker, however, said he wasn't on board.

"I remain skeptical about this proposal, and I wonder whether it's a good deal for the taxpayers," Pritzker told reporters Wednesday at an unrelated news conference. "I'm not sure this is among the highest priorities for taxpayers."

Johnson, however, said that the financing for the project will not implement "any new taxes on the residents of the city of Chicago."

Illinois' top legislative leaders were also doubtful.

"If we were to put this issue on the board for a vote right now, it would fail and it would fail miserably," Illinois House Speaker Emanuel "Chris" Welch said at an unrelated news conference. "There is no environment for something like this today."

However, he added that the environment in Springfield does change.

The proposal comes as two other Chicago sports teams, the White Sox and Red Stars, have expressed interest in public funding for new stadiums.

Warren, who replaced the retired Ted Phillips a year ago, played a big role in the construction of U.S. Bank Stadium in Minneapolis through a public-private partnership when he worked in the Minnesota Vikings' front office from 2005 to 2019.

The Bears spent $197.2 million over a year ago to purchase the site of the shuttered Arlington International Racecourse from Churchill Downs Inc. They envisioned building a stadium on the 326-acre tract of land some 30 miles northwest of Soldier Field, with restaurants, retail and more on the property -- all for about $5 billion, with some taxpayer help.

The Bears had said they would pay for the stadium in Arlington Heights, with taxpayer dollars covering infrastructure costs such as roads and sewers. Those plans stalled, with the team citing a property assessment it said was too high.

By staying in Chicago, the Bears would remain tenants rather than owning a stadium in Arlington Heights. But Warren said he sees it as more of a partnership with the city rather than a landlord-tenant relationship.

"I believe in Mayor Johnson," Warren said. "I believe in his staff, his vision; I believe in this city. I don't look at it as being a renter. I look at it as being able to develop a relationship, to be able to come together. People asked that same question in Minnesota: Why would you want to be a renter?"

ESPN's Courtney Cronin and The Associated Press contributed to this report.