I think coordinating an Acquisition/Acquisition Integration Strategy Summary (one-pager) would be a great place to start. This is one the primary documents we incorporate into our workshops early for our project workstreams to provide insight into Due Diligence research and findings that has already been identified by IMO for proper alignment. By that I mean, having a document that contains your Exit Strategy, Information on the acquired block, How you plan to Win (e.g., Value Proposition/Synergy Overview with Success and Measurement Goals) and Key considerations (e.g., Risks, Issues, Relationships, employee/culture considerations) to take into account during the integration.