While it's pure speculation (and clickbait) from ITM, it remains a possibility. Doubt there's any merit or chance of it happening though.
We’re talking about Disney Princess Ariel from the Walt Disney animated classic The Little Mermaid (1989), who reportedly is the highest-paid Disney character in the nighttime spectacular Fantasmic!
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While Disney has not announced any official plans to invite Halle Bailey’s version of Ariel into the upcoming Fantasmic! performances, thinking that the live-action Princess could appear during the nighttime spectacular is not farfetched, especially considering that new characters like Moana and Mirabel have already been included in the show. However, as of this article’s publishing, this remains purely speculative.