Predicting how invasive alien plants (IAPs) will respond to global change is a central challenge for ecology and conservation, yet many forecasts do not consider the functional traits that actually govern invasion success. Here, we investigate whether global change will simply modify IAP ranges uniformly or instead reorganize the functional composition of invasive assemblages. A set of 104 IAPs established across mainland Italy and its islands (hotspots under high invasion pressure) was investigated combining functional classification with hierarchical ecological niche models and explicit dispersal simulations. IAPs were grouped into functional classes whose current invasive ranges are jointly shaped by anthropogenic pressure and climatic filtering. Projections to 2070 under contrasting scenarios reveal consistent but markedly non-uniform range changes, indicating that global change reorganizes dominant strategies rather than uniformly increasing richness. These results argue for moving beyond reactive, species-by-species control toward management that integrates functional syndromes, propagule pressure, and dispersal processes, improving early warning and resource allocation in a rapidly changing Mediterranean.