Embraer, the aircraft manufacturer based in São José dos Campos, Brazil, has announced significant advancements in its Energia sustainable aircraft project. The project's focus has expanded from 30-seat to 50-seat aircraft, with a notable exploration of hydrogen gas turbine/dual fuel (GT/DF) technologies. This shift complements the existing research on hybrid electric and fuel cell propulsion systems. The developments have been influenced by feedback from Embraer's Energia Advisory Group, a diverse panel of aviation stakeholders. The company aims to develop sustainable and commercially viable aircraft for the future, emphasizing propulsion technologies, aerodynamics, and passenger comfort. The updated Energia concepts include advanced airframe designs, improved aerodynamics, enhanced cabin comfort, and reduced noise levels, particularly from rear propulsion configurations. Embracing hybrid-electric concepts, Embraer is working on a parallel hybrid electric powerplant that combines next-generation thermal engines with small electric motors to enhance efficiency. The fuel cell concept promises zero carbon emissions but requires optimization for weight and drag reduction. Notably, the hydrogen/dual fuel concept presents a flexible solution with options for hydrogen-only missions and dual fuel usage. This endeavor showcases Embraer's commitment to sustainability and innovation, with a vision to potentially introduce an Energia concept into service within the next decade, aligning with evolving technology, infrastructure, and regulatory landscapes.