I’ve read that Rowling originally intended to kill Arthur Weasley during the battle in the Ministry of Magic in Order of the Phoenix. As we know, she instead killed Sirius. I think that I want to write a piece of flash fiction about how things would have been different had Arthur died instead, and the aftermath of that. I would also like to use a prompt generator that gave me the first sentence, “He awoke from a nightmare about garden gnomes and shuddered.” I think this would go along well with the Arthur storyline.