Big PSP Game Next Week?

PSP owners, mark your calendars for next week (we're not sure of the specific day, so just put a red streak through the entire week)! Next week's issue of Famitsu will reportedly contain the exclusive scoop on a big PSP game. The game is said to be a sequel to a hit title, but this is all that's been revealed so far.
What is this big game? Like you, we'll have to wait until next week to find out. Next week's issue is due out on 7/14, but the info should leak out a few days prior to that.