MARS2 2025 Challenge on Multimodal Reasoning: Datasets, Methods, Results, Discussion, and Outlook. - Peng Xu; Shengwu Xiong 001; Jiajun Zhang; Yaxiong Chen; Bowen Zhou 002; Chen Change Loy; David A. Clifton; Kyoung Mu Lee; Luc Van Gool; Ruiming He; Ruilin Yao; Xinwei Long; et al. (CoRR, 2025)