Since 1980, union movements have lost legitimacy in the struggle to guarantee the fundamental labor rights of the working masses (inclusion, quality and stability of work), globally and in Latin America. In the Mexican context, and from the post-Marxist theoretical perspective, the study aims to prospectively explain three feasible scenarios, about which the trade union and related movements could discuss, to promote and build a new hegemonic bloc, which fights to maintain and improve the fundamental achievements of the majority of the working masses, counting on the agonistic participation of the national government, the great oligarchies and international organizations. In general, the results indicate the possibility of promoting certain dynamics of trade unionism, which would contribute to strengthening disputes over employment rights, in a synergy where a wide range of agents could be involved, from workers, governments, international organizations and the oligarchies. It is concluded that the contextual and theoretical review demonstrated the feasibility of formulating the three scenarios, and with them interpreting the prospects of the union movements for the case of Mexico.