"Dragons," Moqorro said in the Common Tongue of Westeros... "Dragons old and young, true and false, bright and dark. And you. A small man with a big shadow, snarling in the midst of all."
From the rest of the conversation, the "small man" is indeed supposed to be Tyrion, and this surely means that he'll be intimately involved in the matter of dragons. As to the various dragons... hard to say. There's many different readings. The old dragon might be Aerys, for example, connecting to details learned from Barristan Selmy in this novel. Given events in this novel, the reference to a false dragon or dragons immediately caught our attention. Is this a sign that someone presented as a Targaryen heir is not a Targaryen in fact? An alternative suggestion is that Quentyn Martell is not a "dragon", but it seems to us that he never attempts to present himself as such.