The latest batch of trademark filings include three from Sega. Warning: one of them contains the word "Valkyria" ala Valkyria Chronicles.
Sega has filed trademarks for "Galaxy Conquest," "Ryu ga Gotoku Kizuna," and "Valkyria Duel."
Of these, Ryu ga Gotoku Kizuna is the social Yakuza game (the series is known in Japanese as Ryu ga Gotoku) that was released for iOS and Android on March 26.
As for the other two, you're going to have to wait for Sega to make an announcement!