2 Dollars - Elizabeth II Martian Manhunter

Niue has leveraged its status as a sovereign Pacific island nation with treaty minting rights to produce an extensive run of licensed pop-culture silver issues, of which this DC Comics piece is one. The arrangement allows foreign mints — in Niue's case typically the New Zealand Mint — to produce legal tender collectibles under Niuean authority without any expectation of domestic circulation.

Martian Manhunter, introduced in Detective Comics #225 in 1955, was a founding member of the Justice League yet remains commercially underexploited compared to flagship characters, which keeps licensed issues featuring him relatively niche even within the series.