Disappointment.
TBH, we never have had "disappointment" in previous AX/JX. Namco always have something in their sleeve, like last year's Digimon Story Cyber Sleuth. This year we got some great potential announcements too: Gundam Breaker 3, Sd Gundam G Genesis and big surprise of the night: Digimon World Next order. I also expect Namco to have 3DS Jump games too: Dragon ball Fusion and One Piece Grand Arena.
NISA also has a presence in both conventions but last year all they announced were couple of anime localizations. They had game announcements before that, so who knows, maybe they'll have some surprises this year. Cladun Sengoku and Rose should be next in line.