When I saw this contest theme I knew I had to make an entry, and it was actually the reference photo section that made everything click for this one.
I have had this GOTG series Ironman sitting in my parts bin forever and having been trying to find the perfect use for it, and the picture of Shriek made perfect sense.

Head to toe this figure is an ML Ironman, which suits the tech-based villain perfectly.
I sanded off the armor details from the ab crunch to the knees of the figure to give it the sleak body suit look, but decided to keep the boots as it seemed to add something to it.
I sculpted the new front of the helmet onto Ironman's, making use of what the sculpt already had existing.

After that it was painted and sealed.
Seeing it all finished made me realize how happy I was with the base figure for Shriek, and it certainly has made me want to build more Batman Beyond characters.
Comments and criticisms are always appreciated!