Actvision are already drumming up a new Hero game - Drum Hero, in spite of the fact that their latest one has been unsuccessful so far.
DJ Hero has just been released 2 weeks ago and has manage to sale 122,000 PAL copies across all 4 consoles according to the October's NPD results. Other games that was released on the same day has sold more than DJ Hero did eg. Tekken 6 on PlayStation 3.
It seems the amount of copies sold in the UK were extremely low as well.
Asda, the second largest supermarket in the UK, has cut the price with a recommended retail price from £89.99 to £75 PlayStation 3 and Xbox 360 versions. So the UK has been given a price cut just after 2 weeks of the release.