Merge multiple pbix/datamodel

The ability to merge Data sets created early in development phase would be a great addition.
We had two teams working on Data sets from Dynamics CRM and SQL Server respectively.
There are different reports built using these independently (Power bi Service as Data source).

Now there might be situations where we would like to see Reports based on these two data-sets together.
The Only option currently seems like recreating one of the model in another pbix file.
A Pure Merge and compare experience would be really helpful.