The idea is to avoid splitting votes and increase their chances of unseating the current president.
Despite this shared goal, the leaders have not been able to agree on when the selection process should begin.
Some believe the decision should be made early enough to allow the chosen candidate to campaign across the country and build strong support.
Others feel it is too soon and argue that rushing the process could create unnecessary tension within the group.
This disagreement has slowed down progress within the alliance, leaving supporters uncertain about the direction the opposition will take.
Political observers say that without a clear timeline, the coalition risks weakening its position as the next election approaches.
The situation is further complicated by the fact that all the key figures in the alliance have strong political bases and ambitions.
Each leader brings their own following and influence, making it harder to convince others to step aside.
While they have all pledged to support whoever is eventually chosen, questions remain about whether that unity will hold when the time comes.
Leaders within the group have tried to reassure the public that talks are ongoing and that a solution will be reached.
They insist that their focus remains on offering Kenyans an alternative leadership and addressing issues such as the cost of living, unemployment, and governance.
However, critics argue that the lack of agreement on such a key issue could signal deeper divisions within the alliance.
They warn that if the leaders fail to resolve their differences in good time, it could affect their ability to mount a strong and united campaign.
For now, the opposition remains in a waiting position, with discussions continuing behind the scenes.