[JustryGT]

Well I thought I had a good idea with using Darth Sidious's hood if there needs to be plastic. Otherwise a guess a green cloth hood and cape could be made.
I didn't have any other current Destros so I opened my exclusive Destro . The head socket was too small so I just placed it on the Doom body and took a picture here;
Toyark Toy Forums - JustryGT's Album: single shots

The Doom in your new photo has leg and arm coverings similar to colossus or Marvel Universe Thor. It is too bad they both have such tall boots.
In my photos you will also see my attempt at fitting the Sidious Hood on Destroyer because he use similar patterns (if you could overlook the rivets) . But he is too big and his neck is hunched over like Hulk.
I think this new Doom armor would be best if it was mostly custom made. Otherwise, you could hack together pieces from iron man and marvel universe figures to get it close enough.