I'm not really sure about such system, but if someone gets successful in building something like that which you mentioned then things could be really good for investors. And, if the accuracy of such simulator is very well then I think it can be a sellable piece of software, and the whales might pay you for such simulator without rethinking.

If you're planning to add the function of trending news, then I think it should be far better to train your AI in a way that if could create better simulative environment and more accurate quotes with the help of news trends. If the AI is able to learn the news and is able to simulate the data and can come up with a high quality quote that's mostly accurate then I'm sure that everyone would love something like this.