Batman and Wonder Woman are just some of the superheroes casino operator Melco Crown Entertainment Ltd is deploying at its new $3.2 billion casino in Macau, which opens on Tuesday in the midst of a sharp downturn for the Asian gambling playground.

Mariah Carey will headline a star-studded opening ceremony for the Hollywood-themed Studio City resort, Melco Crown's third in the southern Chinese territory, the only place in the country where casino gambling is legal.

Macau's gaming revenues have slumped to around 4-year lows as China's economic growth slows and a corruption crackdown deters high-rollers. Studio City brings a new element to the city in terms of non-gaming amenities, but analysts say its opening will not change the industry's gloomy outlook.

"Until the macro situation is resolved, it is unlikely that new property openings no matter from which operator will add significantly to industry revenues," said Michael Ting, analyst at CIMB Securities in Hong Kong.

Studio City is the second resort to open in Macau this year after Galaxy Entertainment Group Ltd opened its Broadway casino and resort extension in May.

Melco received permission to operate 250 gaming tables, more than the 150 tables predicted by analysts but less than the 400 tables Melco had requested from the government.

Studio City's non-gaming elements were the main reason for the allocation, said Lionel Leong, Macau's secretary for economy and finance. The government granted Galaxy 150 tables earlier this year and an additional 100 last week.

Since opening in May, Galaxy has grown its market share among the six Macau operators, even though it posted a 29 percent revenue drop for the third quarter.

Union Gaming analyst Grant Govertsen said Galaxy was benefitting from strong growth in its mass segment, even though it remained vulnerable to another slump in VIP revenue due to its reliance on big-spenders.

Melco, by contrast, is more positioned towards the non-VIP sector, a strategy its latest casino is set to reinforce.