Several opposition parties have confirmed participation in the G100 summit in Abuja, a meeting intended to develop a framework for cooperation ahead of the 2027 general election.
The African Democratic Congress, Social Democratic Party and a faction of the Peoples Democratic Party are among groups expected to participate at the Yar’Adua Centre.
The Labour Party has opted out.
ADC National Publicity Secretary Bolaji Abdullahi said the summit was not designed primarily to select a single presidential candidate.
He described the immediate objective as establishing terms for cooperation and identifying practical areas where opposition parties could support one another.
Possible areas of collaboration include polling unit coverage, collation centre monitoring and broader election logistics.
G100 convener Salihu Mohammed Lukman said the summit was intended to create a formal architecture for transparent negotiations rather than decide leadership questions in a single meeting.
The organizers said G100 would act as a facilitator rather than replace the constitutional authority of participating political parties.
Representatives of the ADC, Allied Peoples Movement, Nigeria Democratic Congress, PDP, Peoples Redemption Party and SDP were expected, alongside members of the House of Representatives minority caucus and G100 signatories.
The Labour Party said it did not intend to attend because it already regarded itself as having a national structure linked with organized labour.
Its spokesman said the party was not opposed in principle to opposition cooperation but did not believe it required another coalition arrangement.
The Tanimu Turaki led PDP interim leadership said the summit could eventually contribute to discussions about a united opposition presidential candidate.
That possibility remains unsettled.
The meeting therefore begins with a narrower objective: building cooperation among parties that remain organizationally separate and may continue fielding their own candidates. The significance of the summit will depend on whether participants can move beyond dialogue and establish durable mechanisms for joint political action