Using the Metaverse, people can connect, trade and have fun in large online spaces together. The chapter highlights how AI and Blockchain will help to create and sustain the future Metaverse. Having AI makes avatars more capable, lets individuals personalize everything, manages the economy, creates information on its own and improves how the Metaverse looks and feels. At the same time, blockchain brings trust, decentralization and transparency through the help of NFTs, decentralized identities, smart contracts and secure data management. It looks at how AI and blockchain provide security, protect AI systems, share data privately and aid the creation of new organizations known as DAOs. However, AI still has to handle issues such as serving plenty of users properly, making AI trusted, linking computing systems across platforms, conserving energy and providing protection for everyone’s information. We now explore how AI and blockchain can help create inclusive Metaverses by mixing sustainability, innovation and trends like MaaS and cross-platform identities. This article explains some of the possible features in Metaverses, emphasizing security, fairness and making certain users retain control.