Here's what I found on WDW News Today:
Giant Epcot Update
It appears the Epcot's 25th Anniversary Celebration will be happening, as a whole bunch of pins are being released October 1st to commemorate the silver anniversary. There is no official acknowledgement of the celebration by Disney, but this may be the first step towards making it official and at least lets the public know they have not forgotten. This is announced in addition to the news of a special ceremony on October 1st we mentioned earlier today. Bigger pictures of thse pins can be seen on our pin trading page.