**The release of Mega Forces Tins on August 28 is the dominant catalyst pushing trader consensus toward a price decline for Mega Dragonite ex variants by August 31.** These tins feature an alternate-art Mega Dragonite ex promo alongside booster packs from the Mega Evolution—Ascended Heroes set, directly increasing supply of desirable Dragonite artwork just days before the snapshot. With the check occurring only three days after the drop, the market anticipates a near-term influx that typically softens secondary-market values for chase cards in the same cycle, especially SIR and illustration-rare treatments that have already seen volatility since the set’s earlier 2026 launch. Pre-tin momentum from critical reception and collector demand has kept select copies elevated, but the confirmed product timing creates a classic supply-shock scenario familiar in Pokémon TCG cycles, where new promos often cap or reverse short-term gains. No major counterbalancing events—such as strong tournament play or additional hype—appear imminent in the narrow window, reinforcing the 67.5% implied probability for “Down.”