Recent trader sentiment favoring a price decline for the Mega Dragonite ex Special Illustration Rare from Ascended Heroes by August 31 stems primarily from the impending August 28 release of Mega Forces Tins, which spotlight alternate-art Dragonite promos and will inject fresh product into the market. Recent sales data show the chase card #290 already experiencing volatility and modest pullbacks from peaks near $720, consistent with post-set correction patterns seen in prior Mega Evolution expansions. Heightened supply from the tins, combined with ongoing collector rotation and chart tracking on platforms like TCGplayer, has reinforced consensus around near-term downward pressure ahead of the month-end snapshot, though strong long-term demand for premium illustration rares could limit the drop.