The Bavarian culture ministry said in a statement it would "see what legal options we have available to deal with the problem of the free publication of Hitler's book "Mein Kampf" after the copyright runs out".
Hitler's manifesto Mein Kampf (My Struggle), written in 1924 while the future dictator was languishing in a Bavarian prison, is both a vicious anti-Semitic tract and rambling memoir.
The book is not banned as such in Germany but the state of Bavaria, which holds the rights, refuses to permit sales of old copies or reprints - even taking potential publishers to court.
Instead, the state announced in April that it would release an edition with historians' commentary as well as a separate version for schools in 2015 in order to beat commercial publishers to the punch.
Bavarian Finance Minister Markus Soeder defended this plan, telling monthly magazine Cicero that the tract must be "de-mystified" and calling on the federal German government to get involved.
Around 10 million copies were published in Germany until 1945, according to British historian Ian Kershaw.
From 1936, every German couple marrying received a copy as a wedding gift from the Nazi state.