Oh, OK. I was thinking that was probably what you were using the model for, but wasn't sure.
However, it seems that what you really need is just some sort of a "flatten" tool? Something (maybe just an app) that would "Convert to Finished Model" (deleting all temporary & demolished elements, and bringing everything into one phase). This should be something that can be implemented using the API (but I'm always surprised by gaps in the API & Dynamo). In addition to posting here, you might want to also post in the Exchange Apps Ideas:
https://forums.autodesk.com/t5/exchange-apps-ideas/idb-p/162/tab/most-recent
What threw me off was the request for it to be part of the Bind process. Why link it in (if you're just going to Bind it), instead of just modifying the original model? Or have you already linked in the previous model as existing (maybe in a schematic design model?), but now want to "purge" the demo stuff and phases for performance reasons?