One of the major attractions at Supanova is the special guests - often well-known personalities of interest to convention attendees who participate in signing sessions and panel discussions with their fans.

[7] In June 2016, founder Daniel Zachariou shared on his Facebook page a petition calling for all transgender education to be stopped in schools, and claimed that the Safe Schools program forces children to "learn about sex, gender fluidity and transgenderism at ages as young as 5 without the supervision of parents".

He further stated "in no way did I intend to express transphobic or homophobic views, which would not align with the values of acceptance and camaraderie that I hold and aim to demonstrate through Supanova".

[10] At Supanova Sydney in June 2021, a stall in the artist hall was found to be selling items including rising sun flags, merchandise with swastikas, fascist and homophobic statements, and shirts proclaiming pride in a "Christian, heterosexual, pro-gun, conservative identity".

[11] Supanova issued a statement stating that they "thoroughly investigated the matter with the assistance of the information provided by attendees overnight, and the exhibitor was subsequently removed from the event".

[13] In response to the poor handling of the Sydney 2021 stall incident, Zachariou stepped down as Event Director in July 2021, though he still remains with the company.