Celeste O'Connor has been cast in Madame Web. They are rumored to be playing Mattie Franklin, a Spider-hero from another reality who lost her home reality due to an multiversal incursion and wanders the Spider-Verse.
For those unfamiliar with Mattie Franklin, Mattie was the niece of JJ Jameson and a huge fan of Spider-Man. She took part in a magical ceremony that imbued her with super strength and the power to fly. She used her power to impersonate Spider-Man before deciding to become the third Spider-Woman. Her powers were stolen from her by Charlotte Witter and when Mattie got her powers back she also gained Charlotte's psychic spider-legs as well as some of the powers Charlotte had stolen from Spider-Woman Jessica Drew (a psionic version of Jessica's venom blasts) and Julia Carpenter (psi-webs). Mattie became a protege of Cassandra Web until she and her mentor were both hunted down by the Kravinoff family.
With the connections to Madame Web, Charlotte Witter and magic, Mattie would be the logical choice for Celeste to play in a magic-based Spider-film.