Board Thread:General Discussion/@comment-24942479-20170515093934/@comment-25926288-20170515104214

It could be possible; however, those example you used are faulty.

1. The Dark Curse could have sent Tink back to NVL.

2. Blue didn't leave Storybrooke. Black came to Storybrooke and took Gideon from Blue.

So, while likely, nothing is confirmed to be so. We assume at best due to Silver being in WL and TL going to NVL.