The latest
DWM has dates for next years dvd releases.
Jan 7th -
Shada +
More than Thirty Years in the TARDIS
Jan 28th -
The Reign of Terror 
Feb 18th -
The Ark in Space special edition.
Mar 11th -
The Aztecs special edition +
Airlock
June 25th -
Terror of the Zygons
June -
Spearhead From Space blu-ray.