Seeing as the 1st season of Thunderbolt Fantasy was in the Summer 2016 anime composer list (even though it's not quite anime), I suppose I might as well post this information here for the lack of a better place, as I don't think it belongs in the drama list either.
Thunderbolt Fantasy 2: Hiroyuki Sawano, Takafumi Wada
Sources:
http://www.sawanohiroyuki.com/inform...nerboltSeason2
Hiroyuki Sawano's official Twitter:
[1] [2] [3]
(Pictures show Wada and Sawano mentions working with him in the tweets.)