I'm not sure who 'J K Malone' specifically is in the context of erotic stories. There could be many individuals with this name, or it might be a relatively unknown or fictional name within a particular niche of such literature.
I don't have any data to suggest that J T Malone's erotic stories are popular. Since I'm not familiar with this specific author, it's hard to say whether their works have a large readership.
I'm not sure who 'J T Malone' specifically is in the context of erotic stories. There could be many individuals with those initials. It might be a relatively unknown or self - published author in the realm of adult - themed literature, but without more context it's difficult to say exactly.
J.K. Rowling's retroactive back stories often enrich the Harry Potter universe. For example, the back story of Snape. We later learn about his complex past, his love for Lily Potter which influenced so much of his actions throughout the series. His childhood, his time at Hogwarts as a student, and how he was bullied and his relationship with the Marauders all added layers to his character that we didn't initially know when we first met him in the earlier books.
I don't think there's been any announcement regarding the release date of her new stories. It could be months or even years away, depending on her writing process and how far along she is with the new works.
There are new stories in a way. J.K. Rowling has continued to explore the wizarding world through Pottermore (now Wizarding World Digital) where she has released additional information about characters, their backstories, and events that didn't make it into the main books. This includes things like the history of Hogwarts houses in more detail.
One popular J K Rowling fanfiction might be those that explore different relationships between the characters from the Harry Potter series. For example, stories that focus on the friendship between Hermione and Luna outside of the main plot of the books. Another could be ones that give backstories to minor characters like Neville's family history in more detail.
I'm not sure specifically which 'J Skorpio' non - erotic stories there are. It could be that J Skorpio has written some adventure or mystery stories. Maybe you can try searching for 'J Skorpio non - erotic works' in libraries or on literature - related websites.