As you can see from the graph, PS All Stars is off to a slow start, but if Sony market it well and release lots of good DLC then I believe it could overtake SSBB!
My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right