Directly from Julie Plec herself... it IS a "conversation".
During the "I Was Feeling Festive in Mystic Falls Convention" on December 2nd, 2023, Matt Davis asked Julie "are we going to do The Vampire Diaries: The Movie". Pausing, Julie responded with "Apparently, it's somebody's desire to do that", much to his, and the fan's surprise. When asked about "who", Julie only offers that "it's a conversation being had".
Wonder what this could entail? Is it Post TVD finale? Is it related to Legacies? Oh the possibilities could be endless. Would you even want it to happen, given the number of cast members saying they're 'done'. (Really want Kat to come back as Bonnie or even have her with children). Would it be canon to the series. Or is it a whole new cast in the TVD name to launch the "fourth" series? Who knows. Just something to think about. The current information is kept on the TVDU article!