Organizing a challenge based on an accepted challenge proposal may be time-consuming, especially when large-scale data annotation is necessary. To address the traditionally tight schedule between MICCAI challenge acceptance and organization, we offered an early review of MICCAI 2024 challenge proposals in the call for MICCAI 2023 challenges. Organizers interested to organize a challenge in 2024 were able to receive an early acceptance that leaves time for careful preparation of the challenge. Only convincing challenge proposals were accepted in this round. Other challenges were asked to resubmit in the next call for challenges.