In 2018
Thor Ragnarok was released on
REGION FREE 3D blu-ray worldwide except in the USA, where it is 2D only
Best place to buy 3D version:
https://www.amazon.co.uk/Thor-Ragnar...or+ragnarok+3d 
original post:
Trailer has just come out and it looks great. Here's hoping they really push the 3D for this one as the series deserves it. I loved The Dark World but it could have done with stronger 3D.