According to a recent report of Keisei Railway's mid-term business plan ("D2 Plan"), to address the surging number of foreign visitors, a new limited express service will be introduced by FY 2028, from Narita Airport to the city, utilizing the Keisei Oshiage Line, with direct access to the Toei Asakusa Line. Rolling stock image is merely conjectural:
https://news.yahoo.co.jp/articles/173de06d062ba8b837c67e803d8909ecea9f761c
*run through translator for details
Keisei corporate source:
https://contents.xj-storage.jp/xcontents/AS01810/ee7af440/4014/40b9/b2dc/93cb1a4cced2/140120250520559506.pdf