There's still tons to come from TGS yet - Atlus will unveil Persona 5 finally and make some new announcements and some companies haven't had their stage events yet (Tecmo Koei, Capcom etc), which are this weekend. As for Nintendo, they are there, it's just they're concentrating on the New 3DS models and their third party lineup more than what they're developing internally. Who knows, they may give us some new surprises yet.
SEGA announces new game for phones/Vita - World's End Eclipse [made by the Valkyria Chronicles team]:
And gosh darn it, that music is so obviously Hitoshi Sakimoto (Ivalice series, Valkyria Chronicles, Breath of Fire V). So good.
Guess it's a no chance in English since it isn't Sonic? *sigh*