Viva Las Vegan and 91

On October 1, 2017, a gunman shot at the Route 91 Harvest Festival country music concert - with 22,000 audience members - in Las Vegas. The death toll was 58 people killed, over 500 injured, plus the suicide of the gunman. Police report the shooter, Stephen Paddock, 64, of Mesquite, Nevada, who was holded up on the 32th floor in the Mandalay Hotel, died by suicide. The setting was bizarre, next to the Luxor Casino and Hotel, with its Sphinx and Pyramid in plain view.

As of mid-January 2018, the event is still discussed, and syncs are being revealed as they come into people's awareness.

As some have noted, Blade Runner 2049, which was released widely in the US on October 6, 2017, the Las Vegas shooting impacted earlier openings. Blade Runner 2049 premiered on October 3, 2017 at the Dolby Theatre in Los Angeles, although following the 2017 Las Vegas Strip shooting, the red carpet events were cancelled prior to the screening.

One of the surprises of Blade Runner 2049 is that the character Rick Deckard (Harrison Ford) is not in the wilderness of the North, but instead is living in the ruins of Las Vegas, after a nuclear event. He is tracked there by agent K.

Another movie, Kingsman: The Golden Circle, which came out around the same time as Blade Runner 2049 had a Las Vegas link too.

During the movie [Kingsman: The Golden Circle] they were at a concert/festival with a pyramid in the background. Source

20th Century Fox originally scheduled Kingsman: The Golden Circle for a summer release date of June 16, 2017 but pushed the film back to October 6, 2017. The film was then moved up to September 20 in the United Kingdom and September 22, 2017 in the United States likely to avoid competition with Blade Runner 2049. The film had an IMAX release.

The code the drug dealer gives the Kingsman at the end of the movie, to save the millions of infected people was: "Viva Las Vegan." Source

‘Viva Las Vegas’ celebarates Vegas, a place of pleasure, where, commonly, you will find a lot of drug and alcohol use, strippers and gluttonous behaviour. All these things are unhealthy and can be dangerous. By using the phrase ‘Viva Las Vegan’ Poppy presents a juxtapositon, as veganism is associated with celebrating healthy eating, being anti -hypocritcal and compassionate. Therefore, perhaps Poppy’s message was that we celebrate the wrong things in society and we should be focussing on being less hypocritcal with our actions. After all, her life ended on a high and this could be owing to the fact she accepted her own hypocracy.
...it was actually the phrase ‘viva las vegan’ that saved humanity. Coincidence? I THINK NOT. Source.

The expression "Viva Las Vegan" is associated with Las Vegas casino owner Steve Wynn, as noted in this 2010 articles, here and here.

Near the end of the movie I noticed the number 91 on the black bowling ball. It reminded me of the 91 logo on the Vegas Route 91 festival signs. Source.

The trivia is intriguing:

During the final fight between Eggsy and Charlie, Charlie picks up a bowling ball numbered '91,' which references 1991 as the fictional birth year of Eggsy.

Both Julianne Moore and Emily Watson starred in a movie about Hannibal Lecter. Moore starred in Hannibal (2001) as Detective Clarice Starling and Watson starred in Red Dragon (2002) as Reba McClane.

Poppy's compound features a bowling alley. Julianne Moore and Jeff Bridges appeared together in The Big Lebowski (1998), in which Bridges's character frequents a bowling alley.  Source.

Kingsman: The Golden Circle (2017) Soundtrack – Viva Las Vegan by Henry Jackman and Matthew Margeson

Sources, 1, 2, 3, 4.