Updated with official confirmation.
Metro 2033 may be getting an enhanced re-release for next-gen consoles. Italian website Everyeye.it included a listing for a PS4 and Xbox One version of "Metro: Redux." The site removed the incriminating info, but All Games Beta managed to save a snap for posterity.
According to the original listing, Redux would include Last Light, some DLC, a soundtrack, art cards, and special packaging. It would be available in July.
Update: Deep Silver confirmed Redux on the game's official website. "Is Metro Redux real? Yes. We never made any secret of 4A's desire to bring Metro to the latest generation of console hardware." More details should be coming soon.