NEW DELHI: Indian billionaire Gautam Adani's flagship group is considering launching a new airline, two sources with direct knowledge said, a move that could potentially reshape competition in a market dominated by IndiGo and Air India.Adani Group is an Indian multinational conglomerate headquartered in Ahmedabad. Established by Gautam Adani in 1988 as a commodity trading company, the Group has since diversified into sectors including ports and airports, power generation and transmission, mining, natural gas, food products, defense and aerospace, and infrastructure development.