With tensions between Washington and Pyongyang sending the risk of a nuclear confrontation soaring, the highlight of the Nobel awards season will be announced in Oslo on Friday at 11:00 am (0900 GMT).
Who will bag the prestigious prize is anyone's guess, as the names of candidates — a total of 318 this year — are by convention kept a closely guarded secret for 50 years.
After President Juan Manuel Santos won the prize last year for his efforts to bring peace to Colombia following a half-century-long conflict with rebel guerillas, a peace prize honouring non-proliferation efforts would be appropriate this year, commentators say.
“The Nobel committee would make a big splash if it awarded the prize to the Iran nuclear deal,” said Asle Sveen, a peace prize historian.
He said the honour could in such case go to former US secretary of state John Kerry, Iranian Foreign Minister Mohammad Javad Zarif and EU foreign policy chief Federica Mogherini — key architects of the landmark 2015 accord.
The Iran deal, concluded with six world powers (the US, Britain, China, France, Russia and Germany) curbed Tehran's nuclear programme in exchange for a lifting of most economic sanctions.
Its supporters say the accord ensures Iran cannot pursue an atomic bomb and shows how open dialogue can defuse even the most high-stakes crises.
But US President Donald Trump has threatened to tear it up, telling the UN General Assembly last month that the deal was “an embarrassment”.
Trump has recently fuelled a fiery dispute with North Korea over the reclusive state's nuclear weapons programme as Pyongyang has conducted successive missile and underground atomic bomb tests.
“With North Korea also at stake, it's very important to support initiatives that guard against the development and proliferation of nuclear weapons,” the head of the Peace Research Institute of Oslo (Prio), Henrik Urdal, said.
Although the identities of candidates for the Nobel — whose recent winners include former US president Barack Obama, Pakistani rights campaigner Malala Yousafzai and the European Union — are officially secret, those eligible to nominate individuals are free to disclose their choices.
An alternative laureate could be the International Campaign to Abolish Nuclear Weapons (ICAN), according to the Norwegian Peace Council.
A coalition of non-governmental organisations, ICAN pushed for the adoption of a historic nuclear weapons ban treaty, signed by 122 countries in July but of a largely symbolic nature without the participation of the nine nuclear powers.
Other favourites for the prize include the UN Refugee Agency (UNHCR), possibly with its Italian chief Filippo Grandi, as the number of people uprooted by conflicts worldwide hit a new record of 65.6 million last year.
The UNHCR has already won the peace prize twice, in 1954 and 1981.
Peter Wallensteen, a professor at Sweden's Uppsala University, meanwhile said he thought this year's nod could go to Congolese doctor Denis Mukwege, nicknamed “the man who mends women” for his treatment of survivors of sexual violence.
Syria's “White Helmets” rescue service and Pope Francis are also believed to be on the list of contenders.
Other names circulating are the American Civil Liberties Union (ACLU), Saudi blogger Raif Badawi and independent voices such as Russia's Svetlana Gannushkina and the Novaya Gazeta newspaper and Turkey's Cumhuriyet daily and its exiled former editor Can Dundar.
In the past year, two big Nobel names have passed away. The head of the Norwegian Nobel Committee, Kaci Kullmann Five, died of breast cancer in February, and Chinese dissident Liu Xiaobo, passed away in July after several weeks of conditional freedom, never able to pick up the Peace Prize awarded to him in 2010.
There has also been broad disappointment over Aung San Suu Kyi, the 1991 peace laureate who has been widely criticised for her failure to stop the atrocities being committed against the Muslim Rohingya minority in Myanmar.
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