it should sell really well on pc. as for console itll prob sell well but might not sell as well as other games like crysis 2 and homefront since its a teambased game and isnt getting alot of publicity.
Interesting thought, but read a little earlier in this forum and you will notice a link to pre-order sales. I did a little compare and contrast. Brink already has more sales than Crysis 2. The real intriguing fact about that? Crysis 2 had around 81,805 for Xbox pre-orders with one week to go; Brink with three weeks to go had 164,720 for Xbox (these pre-order sales are the ones in America only).
P.S. That is more than double the pre-orders for Brink, and there is no game leading up to Brink nor is it well advertised.