Let me put it this way last year take 2 made $334.3 Million in revenue, Activision-Blizzard made $4,447 Million (that's almost 4 and a half Billion) so more than 13*larger.
If take 2 want more stability and to keep their identity they would be better off merging with ZeniMax Media (Bethesda) or THQ IMO and a merger with ether of those companies would make them one of the biggest publishers around.
I think that Take 2 number is for one quartre only.
On a yearly basis it should be more like 1,1 billion. Still four times as small.