This paper takes the notion of inclusion as an imperfect and contested project toward educational and social justice, which seeks to address social and historically constructed exclusion. It aims to problematise 'inclusion research' of school and community relationships in Mexico by examining the orientations and implications for inclusion of doing educational research aligned with a more 'Western' critical approach to social justice as opposed to research explicitly situated in a decolonial and intercultural perspective. It firstly characterises how inclusion is dealt with by critical and decolonial perspectives. Secondly, through a comparative exploration of two ethnographic research projects about school-community relationships, it analyses the implications of both approaches and explores the articulation between 'substantive power' and 'formal power' in the research, arguing for the need to include an epistemic and ontological dimension in inclusion as social-justice-oriented research.