This would be a lot easier to decide if there was some uniform metric that could be used to determine "Failure" of each of the games ... Unfortunately, that is not the case.
The Conduit is faited to sell at a level where it turns a healthy profit for the publisher and the developer, High Voltage will be able to coninue making mainstream games (rather than licenced crap), and yet it will probably be called a failure by some people because it only sold 1/8th as much as Wii Fit.
Killzone 2 will (probably) sell enough units to break even, and be a fairly good (but not great) game but is doomed to be used in endless forum battles about which system is more powerful because, although it will be visually impressive, it will be render below 720p and will suffer framerate issues in some places.
Too Human will be a game that will never sell well enough to overcome the opportunity cost of being in development for a decade, will have a ton of problems which are associated with such a long development cycle, and yet will have moments of brilliance which (almost) make up for the flaws.
