I think that there will be quite a few PS3/XBox 360 ports on Nintendo's successor console, and I think this will happen regardless of how powerful of a console Nintendo ends up producing ...
Many publishers will enter into the next generation in a financial mess and will have difficulty getting access to capital for development. In many cases I expect that they will take an approach of releasing an "upgraded" version of their PS3/XBox 360/PC game (typically the highest detailed models/textures from their PC version with any mods) to as many next generation consoles as they can to get the cash they need to survive.







