Ken_Kaneki_UWU
Author, first say how it is and what powers MC will have. 1.-The MC world is the same as ours. TRUE? 2.-Will he be able to travel to other worlds/dimensions? 3.-Will MC have adventures and growth in his world?
Bob_Uchiha_XD:If it's your first fanfic story, it will be difficult to write and it will increase the difficulty if you use anime/manga with OP powers. So you could use an anime/manga/hentai that doesn't have a difficult plot and most importantly "doesn't have" gods or beings with reality breaking powers.
Yeah you mix DxD and Jojo universe is not good in my opinion, if you want to combine them you need to change the DxD and Jojo world history. if you want a mix Jojo universe wirh other anime i suggest maybe Persona anime or game since their ability is similiar. then you can travel to other universe instead combine them