The E3 2017 preliminary floor plans have been revealed. Square Enix has reserved a booth at the South Hall next to the Capcom and Microsoft booth. You can view its location in the image below.

E3 2017 will take place from June 15th to June 17th. No Kingdom Hearts presence has been confirmed at the moment.

UPDATE: The final floor plans for E3 2017 have been revealed. The Square Enix booth will be in the South Hall next to Microsoft and Capcom U.S.A.