Tamashii Nations have released the full details of their The Last Jedi Luke Skywalker 1/12 figure which will arrive in May 2018.
Based on his "exile" costume with darker robes, hood and cloak - Luke will be a webstore exclusive costing 6480 Yen. That's around £40 or $57, but the exclusivity will make it harder, and more expensive to pick up for collectors outside of Japan.
We originally speculated that the inner cloak was soft goods, but it now appears the whole figure is sculpted plastic and SHF will include two hood options to interchange - one raised and one down. Interchangeable hands will also be included - one alternative for each hand.
Luke comes with a couple of "specific" accessories. These are listed specifically as "exclusive accessories parts set". That may indicate that wile this release is a Webshop exclusive, the figure may get a more basic re-release without these items in the future. The description on these accessories have been left deliberately vague on the Tamashii website. No doubt to avoid spoilers (scroll past the gallery for some speculation / fact on these accessories)
We are aware the compass is the one we see in the Battlefront II story mode - it allows Luke to find his way to Ahch-To.
The other item appears to be a red crystal on a strap. Speculation is that this is Darth Vader's saber crystal that Luke has kept after the Battle of Endor? I guess we will find out more about this when The Last Jedi premieres.