So far these are only available via the Sanity website (I'm sure JB and EzyDVD will update soon)
Three versions to choose from:
Blu-ray + Digital Ultraviolet
3D Blu-ray + Blu-ray + Digital Ultraviolet
4K Ultra HD + Blu-ray + Digital Ultraviolet
There's also a Blu-ray bundle featuring the three Despicable Me films plus Minions listed for the same date. (No cover art yet)