Far from it, search an WSJ article dated 5/5/14 titled "Dirty U.S. Coal Finds a Home in Europe." So cheap USA coal will fight it out with USA LNG and again coal could harm NG prices, but this time on the world markets. Below if from the article
Low domestic demand has renewed the focus on U.S. exports, which are on track for a record-setting third straight year of more than 100 million tons. The 28-nation EU imported 47.2 million tons of U.S. coal last year, up from 13.6 million tons in 2003. Exports to the U.K. alone are up tenfold in the same period. The U.S. ranked second only to Russia in supplying Europe with coal last year, and the U.S. could further increase its market share if recent political tensions with Moscow disrupt Russian shipments.
Germany's decision to phase out of nuclear power after the 2011 Fukushima nuclear disaster in Japan has also made it a significant buyer of U.S. coal, mostly because the commodity is so inexpensive.
Coal is injured but far from dead. Most of the coal plays will bleed out for a while but then somewhat recover. However it is fair to say that the coal industry in the US will supply less energy over the years and that NG will pick up much of the slack. So yes, I agree with your concept.