That could definitely be a possibility-I REALLY want to know what happened to Bae after he came to our world, and see the next generation make things right.
In the finale, Rumple tells Charming that he’s a big fan of true love and what it creates. This statement seems to me to be highly significant.
I think he was mostly referring to Emma. He may have had everything else set in place for the transfer to SB, (the true love potion, a person desperate enough to enact the curse, a specific place and time to go) but still needed a savior to be born and break the curse.