Holy shit! There a Ghostbusters/Transformers crossover!
Secondary Canon
IDW Comics
1000 years ago, give or take, as a protracted civil war between the Autobots and Decepticons came to an end on Cybertron when the former left the planet. The Decepticons were unable to pursue them due to the presence of Gozer, Zuul, and Vinz Clortho. Megatron, Shockwave, Soundwave, and Starscream approached the Temple of Gozer. After Gozer's counter offensive to Starscream's attack, Megatron declared he would deal with Gozer himself. Megatron walked up the temple stairs. Vinz charged and leaped at him. Megatron knocked him aside and asked Gozer why it came to his world. Gozer replied to came to end Cybertron and implored him to choose the form of their destruction. Vinz Clortho appeared at Gozer's side when he induced telepathic contact with Ray during the Tiamat incident.