The term "most formerly" refers to something that was formally the most prevalent or widely accepted. Some antonyms of "most formerly" could include "least recently," "least formally," "least absorbed," or "least common." These words suggest that the subject is no longer relevant, meaningful, or influential. Alternatively, "presently most popular," "currently in vogue," "currently in use," or "currently prevalent" are antonyms that depict a subject's current relevance, impact, and importance. They suggest that the thing in question is the current trend or the latest fad, and it is highly relevant and significant.