The ceremony is scheduled for March 1, with the line-up of those set to appear including martial artist Donnie Yen Ji-dan, Cantopop artist Joey Yung Cho-yee and more.
Tickets have been priced at HK$10 (£1/€1/$1) though there have been reports of tickets being listed on secondary platforms for as much as HK$1,800.
Some 8,500 tickets for the opening ceremony sold out in under 35 minutes.
Hong Kong’s Secretary for Culture, Sports and Tourism, Rosanna Law Shuk-pui, told residents to remain vigilant.
“The face value of these tickets is not high. At most, they are worth $HK10. If anyone claims to have tickets through different channels and sells them at a high price, this constitutes scalping,” she told a radio programme, as per the South China Morning Post.
The pricy resale tickets have since been removed or bought, according to the article.
In January, Kai Tak Stadium – a 50,000-capacity venue located within the new complex – welcomed 18,000 people as part of a trial concert.
It is set to become the new home of the Hong Kong Sevens, taking over hosting duties from Hong Kong Stadium.
This year’s Hong Kong Sevens event will take place between March 28-30.