"Maybe we can do some announcement during E3," he said today during a question and answer session held at a San Francisco Apple Store, according to GameSpy.
"I can't really speak specifically right now," he added. Kojima is known to have four unannounced projects in the works, with the first releasing as soon as this year.
Kojima was there to promote the recent iPhone release of Metal Gear Solid Touch.
He briefly teased "the next MGS" during his presentation at this week's Game Developers Conference, but did not offer any concrete details beyond its existence.
Once again taking place at the Los Angeles Convention Center, E3 officially runs June 2-4, with publishers and developers undoubtedly making announcements all week.