It seems like PayPal has let the cat out of the bag and announced Steams Fall Sale which is supposedly commencing on November 26 and concluding on Docember 1, also known as "Cyber Monday".
First reported by VG247, the Steam Fall Sales are usually full of savings on a huge amount of games, ranging from 50% to 90% off during the duration of the sale. No word yet of as what games will be on sale, but expect a large collection of games bundled with DLC packs for heavily discounted prices.
If the sale is true, the black Friday will fall in the middle of the Fall sale, so expect great sales on the day.
Valve has yet to confirm this announcement at this moment in time.