Sorry to burst your bubble, but they have nothing to do with each other. The trajectory of the Chelyabinsk impactor was almost opposite of what it would be if it was associated with 2012 DA14. It came in from a completely different direction. You can expect on average one meteorite impact per square kilometer of land every 10,000 years (this also applies to oceans, but we don't care about those so much because they're almost impossible to recover). There are about 20,000 tons of this stuff hitting the atmosphere every year (typically very tiny grains that burn up in the atmosphere), and usually one or two witnessed falls every month, so it's really not as rare of an event as people think. This fall is just unusual for the large size of the impactor, and the number of witnesses who caught it on video. Unfortunately since it was so well observed and widely reported, the cost of any recovered material is going to be ridiculous. This happened with the Tissint meteorite in Morocco in 2011, because it was a witnessed fall of a Martian meteorite it costs $600-800/gram, when the typical going rate for Mars meteorites is $200-300/gram.
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