Maybe Harry Potter builds a magic item company. He could use his knowledge of magic from Hogwarts to create unique products like self - writing quills or flying broomstick upgrades.
Dumbledore (if he were still alive) could be an advisor. His wisdom and experience would be invaluable. Also, some of the Weasley family members like George, who already has experience in running a joke shop, could bring his business acumen to Harry's company, helping with sales, marketing, and product design.
In fanfiction, Harry Potter could build a huge company perhaps by using his magical knowledge. He could start a business related to magical artifacts, selling rare and useful items like invisibility cloak replicas or self - cleaning cauldrons. His fame from defeating Voldemort would attract customers and investors alike.
Hermione would be a great help. Her vast knowledge of magic and books could provide the necessary information for building the planet, like the right spells and magical theories.
Dumbledore might help in a spiritual or advisory way. Even though he's passed away, his wisdom could be passed on through memories or some magical means. Also, Hagrid could be a great help. He could assist in building areas suitable for magical creatures with his love and understanding of them.
In a fanfiction, Harry Potter could be in a situation where he needs to recruit players with strong muscles for the Quidditch team. He might search through Hogwarts to find students who have been secretly training and have the physical strength required for the tough positions in the game, like the Beaters.
In fanfiction, Harry Potter may face challenges like dealing with public perception. Some people might think he's just using his fame from being the 'Boy Who Lived' to make money. There could also be issues with suppliers. If he's running a business related to magical ingredients, for example, getting a steady supply could be tricky. And then there's the matter of expansion. Growing the company too quickly could lead to financial problems and quality control issues.
Ron could also be a great ally. His loyalty and courage would be important. He might be in charge of security, using his skills in wizard chess to plan out defensive strategies. And of course, the Weasley family in general could offer a lot of support, with their various skills and connections in the wizarding world.
Maybe an old wizard who has been secretly studying the combination of different magical universes for years. This wizard could have made some initial attempts at building a lightsaber - like weapon in the past and can share his experiences and mistakes with Harry. He would teach Harry about the balance between the light and dark side of this new form of magic, just like the Jedi teachings in Star Wars.