The term "retro-version" refers to a modern version of a vintage item or design. Therefore, antonyms for this term could be "modern," "contemporary," or "current." These terms refer to designs or items that are new and have not been inspired by an older era. Additionally, antonyms for "retro-version" could also include terms such as "progressive," "innovative," or "cutting-edge," which refer to designs or products that are pushing boundaries and breaking away from traditional styles. Overall, while a retro-version looks back to past trends, an antonym for it looks forward to new, exciting designs and ideas.