We tried Stacker and the idea is great and well executed. The problem is that we have a bunch of stacks already written in Troposphere that output JSON/YAML CF templates. What would be the possibility of adding native support for these? It wouldn't be difficult to import the Stacker package(s) into the Troposphere templates and call something like

stacker.create_blueprint(template.to_json())

Or something similar. You could even wrap the Troposphere template in a class and call that class from Stacker.