If I may...Haldane's classic example is finding a rabbit fossil in a Cambrian stratum. But we could also find a mammalian genome that is closer to that of a fish than to other mammals.
Would those really falsify the entire theory of natural selection and evolution? What would each of those finds suggest as an alternative? If a particular pheonomenon did not have a natural explanation (e.g., a miracle), would science be able to deal with it?
Of course another way of looking at it is that ID isn't an independent theory so much as it's a commentary on evolution and an encouragement to see if one can find a rabbit fossil in the Cambrian stata or a genome that isn't where it belongs.