A Galaxy Theatres had also been planned for the resort, but was never built. Plans for the retail mall and a potential hotel expansion were later canceled, due to the Great Recession. It would be built and operated by Taubman Centers, and would be the first mall in the area. In May 2008, Marnell announced plans for a 1-million-square-foot shopping mall to be added to the resort within four years. Anthony Marnell had an 80-acre site, although he only planned to use a portion of it initially, with the potential for future expansion. The resort was built on property that was previously occupied by the Last Call Tavern truck stop. Rose Parkway, in an area that was expected to see significant future development. The M was built at the southeast corner of Las Vegas Boulevard and St. Construction began on September 1, 2007, and lasted 18 months. Bank of Scotland also provided financing. The company learned of the M project while in negotiations to sell two of its casinos to Anthony Marnell. In April 2007, MGM Mirage was announced as a financial partner in the project, providing $160 million. The project received preliminary approval from the city of Henderson in October 2005. Tony's company, Marnell Corrao Associates, would design and build the M. It was proposed by Anthony Marnell III, whose father, Tony Marnell, built and operated the Rio resort in the Las Vegas Valley.

The M Resort is named after the Marnell family. In 2019, the M entered a partnership with the Las Vegas Raiders football team, which now rents out the hotel before games.

Marnell remained as president for the next four years. In 2010, Penn National Gaming (now Penn Entertainment) purchased $860 million in debt that the resort owed, before taking over complete ownership of the property in 2011.

Construction began on September 1, 2007, and the resort opened on March 1, 2009, amid the Great Recession. His father's company, Marnell Corrao Associates, designed and built the M. It was proposed in 2005, by Anthony Marnell III. The M Resort is located eight miles south of the Las Vegas Strip, and is the southernmost casino in the Las Vegas Valley. The property includes a 92,000 sq ft (8,500 m 2) casino and a 16-story tower with 390 rooms. It is owned by Gaming and Leisure Properties and operated by Penn Entertainment. M Resort Spa Casino is a boutique hotel, spa, and casino in Henderson, Nevada.

Las vegas spa resort casino m logo