Yes, as Avatar_Emil_Borg said please confirm what you’re looking at. This release:
http://rahulandi.com/the-little-mermaid-4k-blu-ray-blu-ray-3d-blu-ray-three-disc-edition-1989/
Isn’t until later this year. If you mean the 2013 Diamond Edition it was absolutely tampered with to the Nth degree - screenshots are here.
The 2013 restoration was done at 4K, but to date hasn’t been released in this resolution.
I would love to be wrong, but I highly doubt that listing from Rahulandi will happen, at least not this year.