The design of future military C2-systems is increasingly influenced by emerging technologies such as AI and autonomous platforms.These systems must operate across domains, evolve rapidly, and remain coherent with operational doctrine and organizationalprocesses. To manage this, architecture frameworks like the NATO Architecture Framework (NAF) are widely used. NAF supportsmodeling coherence and ensures traceability from capability needs to system implementations. However, it lacks methodologicalguidance. To address this gap, we introduce an extension to NAF, building on the principles of Situational Method Engineering(SME). Our proposal includes reusable method components. Specifically, it includes a MAP-based Navigation Guidance thatstructures design intentions and strategies in alignment with stakeholder needs, and two method chunks, supporting core designactivities. One method chunk supports designers to assess the relevance of integrating emerging technologies into existing C2-systems. The other method chunk enables exploration of how new technologies perform across operationally relevant andunderspecified scenarios. Both chunks are grounded in previously validated stakeholder goals and detailed design requirements,ensuring alignment with military capability needs. Our approach complements NAF by providing methodological guidance fornavigating integration decisions. This initial proposal shows how method chunks, combined with the Navigation Guidance, canenhance design adaptability and address socio-technical concerns such as stakeholder alignment and doctrinal coherence. Whileonly two method chunks have been constructed so far, the results demonstrate the potential of a modular, goal-aligned methodrepository to guide C2-system development. In future research, we focus on expanding the method component repository andevaluating the framework in a real-world setting.