World Series of Fighting 22 could be the promotion's biggest event yet.

Kickboxing ace Tyrone Spong will return to the MMA cage for the first time in two years against Strikeforce veteran Mike Kyle and a third title fight -- the inaugural flyweight matchup -- has been added to the WSOF 22 card set for Aug. 1 in Las Vegas.

Spong (2-0) is one of the best kickboxers in the world. He's coming off a broken leg in April 2014 against Gokhan Saki in GLORY. His MMA return, as first reported by MMAFighting.com, now has an opponent in Kyle. Kyle (21-12-1, 2 NC) has fought twice in WSOF and has UFC and Strikeforce bouts under his belt. The 35-year-old is coming off a win against Baga Agaev at Abu Dhabi Warriors 2 in March.

Magomed Bibulatov and Donavan Freslow will face off for the flyweight title. Bibulatov (9-0) is a top prospect and recent signee from Chechnya. Freslow (4-0), who fights out of Wanderlei Silva's gym in Las Vegas, has won all but one of his pro MMA fights via submission.

World Series of Fighting 22 is headlined by a welterweight title fight between champion Rousimar Palhares and Jake Shields. The co-main event features bantamweight champion Marlon Moraes defending his belt against Sheymon Moraes (no relation). WSOF 22 will take place at Planet Hollywood Resort & Casino in Vegas and air live on NBC Sports Network.