Previously, there were rumors that Kangnam, Youngji, Sunny, and April's Jinsol might be guesting on the show. Some of those rumors were confirmed by SBS and the producer of 'God's Voice.' 

An SBS rep told TV Daily on March 30, "Actor Seo Kang Jun, comedian Lee Kuk Ju, GOT7's Jackson, and KARA's Youngji will be sitting in as guest panelists for 'God's Voice's filming session planned for March 31." 

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Lee Guk Ju and Seo Kang Jun had gotten acquainted on 'Roommate 2,' another SBS program which was produced by Park Sang Hyuk, the same guy in charge of producing 'God's Voice.' Park informed Newsen, "The guests came to appear on the show after they got acquainted on 'Roommate' in the past. The episode will air on April 20." Sounds like viewers will be seeing many welcome familiar faces on this new program!