Design a comprehensive communication strategy for a multinational corporation (MNC) that aims to rebrand its image and reposition itself as a socially responsible and environmentally conscious organization. The MNC operates in various industries, including manufacturing, retail, and technology, and has a global presence with diverse stakeholders. The strategy should include:

• A clear and concise mission statement that reflects the MNC's new values and goals.
• A detailed plan for communicating with internal and external stakeholders, including employees, shareholders, customers, suppliers, and the general public.
• A coherent narrative that connects the MNC's past, present, and future actions, demonstrating its commitment to sustainability and social responsibility.
• A framework for measuring the success of the communication strategy, including key performance indicators (KPIs) and metrics.
• A risk assessment and crisis management plan to address potential challenges and negative publicity that may arise during the rebranding process.
• A budget allocation for the communication strategy, including the costs of developing and implementing the plan, as well as the potential return on investment (ROI).