images vandalism

soooo there is a series of games called akumajo dracula, it was published in usa under the name of castlevania

i spent a lot of time researching auctions and history books on the topic and found some actual poster of the time of release and uploaded them. right now almost every picture in the series pages is a fanart made of press assets or scanning art books.

i try to clean up them one by one spending hours on every picture trying to find a single source proving that it is at least an ad or boxart or digital press kit before submitting them for deletion. but for the last month someone uploads 10 new fanart pictures without burden of proof for every single one i research to be tailor made fanart for imdb picture. i can't match that speed, is there anything anyone can do about it? and the quality of new fanart ranges from slapping a trasnparent  logo on artbook scan to actual obvious paintbrush madskillz with [blending options>drop shadow] or glow

how do people become the imdb moderators for images? any way i can become one?