1) Only if it violates patent. For instance, Nintendo has a different form of rumble than what Microsoft/Sony licence. As long as they don't utilize the same technology, or market it in a way to cause consumer confusion, there's no lawsuit. 2) The story indicates it would be an add-on, not to replace the core controller. 3) The goal is to get developers to port Wii-exclusive games over to the 360, so it would depend on how many go for it.
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1) Only if it violates patent. For instance, Nintendo has a different form of rumble than what Microsoft/Sony licence. As long as they don't utilize the same technology, or market it in a way to cause consumer confusion, there's no lawsuit.
2) The story indicates it would be an add-on, not to replace the core controller.
3) The goal is to get developers to port Wii-exclusive games over to the 360, so it would depend on how many go for it.