Tokyo Game Show will soon kick off in Japan. The publishers attending are beginning to announce their respective lineups and now it's Sega's turn to do so. They recently put up their TGS site (via Gematsu) and through it we learned that the following games will be present at the show floor:
Sega Games
Puyo Puyo Chronicle (3DS)
Valkyria: Azure Revolution (PS4, PS Vita)
Yakuza 6 (PS4)
Atlus Games
Persona 5 (PS4, PS3)
While the above titles are the only ones that Sega themselves mention as being available at the show, the Tokyo Game Show site also mentions Phantasy Star Online 2 and Sonic Boom: Fire & Ice.