Alright this is something that a lot of people are debating so I'll throw my 2 cents in it.
I do believe The Conduit will sell very well because, It's a first person shooter (which apparently do well on Wii, I'm looking at you world at war), It's being marketed in all the right places (one thing I found off about the ads for HotD and Madworld were the fact that they weren't advertised on networks that gamers usually watch, although we haven't seen ads for The Conduit), It's rated Teen (This is a big one because it's okay for little Johnny to play it and Mom and Dad don't have to worry too much), and finally everyone is saying good things about it (you have to admit, even the previews that say they didn't like it that much praise it anyway.)
So that's just my opinion.