These days, it involves a lot more than having a big stadium. From the (Minnesota) Star Tribune:
The National Football League had a long and expensive list of confidential requests before it awarded the 2018 Super Bowl to Minneapolis.
Free police escorts for team owners, and 35,000 free parking spaces. Presidential suites at no cost in high-end hotels. Free billboards across the Twin Cities. Guarantees to receive all revenue from the game’s ticket sales — even a requirement for NFL-preferred ATMs at the stadium.
Those requirements and many others are detailed in 153 pages of NFL specifications for the game.
The paper has gotten a hold of the 153-page list of NFL demands and you can read it here, though I’m sure the National Football League would rather that you would not.