Quite the contrary - in the case of this game I believe they will do a port only if it is successful (and someone there even said something to that effect).

Hey, its what Link does in the windwake.

 I think what Pachter said is exactly what you've said. Producing a quick, PS2 to PS3 type port of the game wouldn't cost much - but that's why he suggested it'd be a $20 PSN release instead. Doing it on low resources, similiar to the GOW collection, would still produce a game which looked like a Wii game but just upscaled... hence the PSN suggestion.

 HIs initial suggestion of it costing more to make and taking up more dev time was if they went into the core code and built the port up ground up - redoing all the textures and animations and stuff - so it looked like a PS3 game as oppose to an upscaled Wii game.

 I don't think he's said anything wrong there, just maybe not too clear.

If it was a hit that would probably have guaranteed a PS3 port - hence the original quote around that.  But if it doesn't look like it's going to turn a profit on Wii alone, and they calculate a quick port would scrape in enough extra on PS3 then they'd do it for that reason, too.  I'm only speaking about the latter.

Again, though, as with Alan Wake and a few other recent exclusives, I have to say that going with Wii only seems in hindsight to have been a potentially poor choice.  They would have known about Move in enough time to put it out on both platforms at once and give themselves a bigger base.  I know on paper the Wii should easily be able to carry a title like this, but it would have been so easy for them to go PS3/Wii and further de-risk the title's launch.

Not that I want to believe what this guy says but Warren Spector did say himself that Epic Mickey could come to PS3/X360 due to Move and Kinect being options.

Unless Nintendo helped finance the development of the game or they have some sort of exclusive contract, timed or otherwise, the only technical thing keeping it off other platforms is the ability to adapt a user interface other than the Wii Remote.

It's safe to say the first didn't happen, and the second is also highly unlikely as Nintendo doesn't "buy" exclusives from 3rd party developers because they don't have to. They have their own catalog of Nintendo developed exclusives representing their hardware platform.

Naturally, with the PS Move, the user interface is a non-issue, so the only question is whether DIsney estimates the returns on a PS3 port worth the additional development and release costs.

If they went with a fairly straightforward upscaled port (as seen for unported Nintendo Wii titles being played via emulator on PC with good results), with revised on screen menus to take advantage of the higher resolution, and another fairly straightforward control interface coversion, it wouldn't take much effort.

So, minimal risk involved. It's more of an issue of if demand for a PS3 port justifies the cost of a re-release (which would involve marketing the game again to the new audience).