Pacio (17-3) reclaimed the strawweight belt with a fourth-round knockout over Yosuke Saruta, avenging a split decision defeat from January. Catalan (6-2), a 40-year-old Wushu specialist, earned a shot at gold after winning six straight under the ONE banner.
Folayang (21-8), who lost the lightweight title earlier this year, looks to rebound from a submission defeat to Eddie Alvarez when he takes on Amarsanaa Tsogookhuu (5-1), who successfully debuted in the ONE cage in February with a decision win over Shannon Wiratchai.
Eustaquio (12-8), a former ONE flyweight champion, is 1-2 so far in 2019 with a win over Kyu Sung Kim sandwiched between losses to Adriano Moraes and Yuya Wakamatsu. His opponent on Nov. 8 is Toni Tauru (11-7-1), a former Cage Warriors champion who desperately needs a victory after going 1-6 since 2015.
The third former ONE kingpin on tap is Naito (14-3), who faces off with Pongsiri Mitsatit (10-3) after besting fellow ex-champ Alex Silva in a May trilogy bout. Mitsatit hopes to get back on track after losing a decision to Litao Miao in August.
Joshua Pacio vs. Rene Catalan
Eduard Folayang vs. Amarsanaa Tsogookhuu
Geje Eustaquio vs. Toni Tauru
Yoshitaka Naito vs. Pongsiri Mitsatit
Nong Stamp vs. Bi Nguyen
Jae Woong vs. Emilio Urrutia
Kim Kyu Sung vs. Akihiro Fujisawa
Roshan Mainam vs. Khon Sichan