FugakuNEXT, set to launch in 2029, aims to achieve zettascale computing by integrating AI with traditional simulation HPC. This supercomputer will utilize heterogeneous computing architectures and advanced semiconductor technologies to enhance computational efficiency and flexibility. Our feasibility study, in collaboration with leading Japanese and US vendors, focuses on developing CPUs, GPUs, and specialized accelerators to meet the demands of future scientific research. This presentation will detail the technical advancements and collaborative efforts driving FugakuNEXT, highlighting its potential to transform HPC and AI.