Combine Proofs from Different Projects in a Program

Our team has the desire to send multiple proofs from different projects at a campaign (program) level. To explain further, we understand the ability to send multiple proofs in one workflow is possible, but our teams would benefit from an automatic system to pull proofs from several projects into one workflow for a campaign. The concern is that there isn't a clear way to see all pieces in a campaign in one place and we think something like this would be beneficial.