In 2013 the rock band KISS became major investors in the newly created LA KISS arena football team. They replaced the Avengers, who went out of business the year before. It was an attempt to bring football to Los Angeles. Gene Simmons and Paul Stanley said they wanted the LA KISS to be the team of LA, but Simmons said some time later, it was a ploy to bring the NFL back.

Gene Simmons really wanted to invest in an NFL franchise and was hoping this would be his stepping stone. It was the 4th team from LA in the Arena league. The team was formed in 2013, began play in 2014, and made their inaugural playoff appearance on August 7, 2016, facing the Cleveland Gladiators in the first round of the AFL Playoffs.  The Kiss lost to the Gladiators 56-52. They were featured on the AMC network with their own reality show called 4th and Loud.

When the team went quiet and didn't enter league play, the LA Kiss ceased answering their phones during the 2016 offseason and its roster was liquidated that October. In a long-form piece released in Sports Illustrated in April 2017, it was revealed that the band had pulled its support from the team shortly after the end of the season, privately stating they had done all they could to keep the franchise alive. 

It was around that time that it was announced there might be a team coming to LA, maybe two. The Rams came back, and the Chargers announced their move.

Some of the historic information from Wikipedia