Siliconera: When Tekken 5 came out Namco Bandai released an Ultimate Collectors Edition bundle containing the game, a DVD case, and an arcade stick. Tekken 6 might get the same treatment.
In addition to the standalone game Gamestop lists Tekken 6 "with arcade stick" for the Xbox 360 and PlayStation 3. Unfortunately, the product page doesn't tell us which company is making the arcade stick.
Could Hori be the manufacturer? Namco Bandai partnered with them for the Tekken 5 and Soulcalibur IV sticks. However, the bundle's suggested retail price of $149.99 is a notch too high for a Fighting Stick EX2. Perhaps, Tekken 6 will come with the more deluxe Real Arcade Pro 3 (PS3) and Real Arcade Pro EX (360) sticks.