when in the summer that something game expo thing is gonna be?

That was so vague, I can only list events:

 

Tokyo Game Show usually happens around September or so.

I can't find a date for Jump Festa.

 

Trying to come up with more events, but these are where the new KH trailers always are anyways.

TGS is in September, then after that is the EB games Expo in October, then Jump Festa in December.

what they said ^ unless your talking about E3 which has already taken place.

I forgot about the EB Expo. I thought there was something else.

 

But yeah, they'll most likely have KH at both TGS and JF. That's where they showed all of the Birth by Sleep production trailers.