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Yes, there's a 100% chance it will turn out worse than "Lord of the Rings" and similar works. The idea is good, but there's no need to make such grand statements. The question is whether the concept will be readable. You might have a great idea, but it will be problematic to implement. We all understand here that you shouldn't rush into things with such authors. You can write a more or less interesting story, but you won't be able to surpass your limits. By the way, there's a topic called "Heroes - not just a game, but also a book," you should check it out.
After all, even ordinary people can achieve great things. Nowadays, many well-known authors write with the support of their online friends. Look at the acknowledgments of Lukyanenko, Perumov, Golovachev, etc.
So, I'm not planning anything supernatural