So Slade's a merc so he usually switches sides. He switch sides during the Injustice story line, being a previous villain as pointed out by Cyborg and an Insurgency ally during The Regime, so I hope that counts for the contest.

RECIPE:
Head: Resculpted Extremis Iron Man head cast
Body: Revoltech Snake

So this was an idea I had upon seeing fireflamespit's Deadpool(Sneaksuit) and was further inspired by jadomiddlecustoms' Deathstroke with a similar recipe. If you haven't seen them, do check 'em out they're awesome! :)

As for my take on the custom, I started with the head sculpt using the Extremis Iron Man head cast and modeled the design after Deathstroke's helmet from the Arrow TV series with a few modifications. The body was fully repainted without any modifications save from the added mags on the belt. The strap was made using accessories from the ML movie Punisher trenchcoat accessories. The shoulder pads came from Jakks WWE elbow pads. The sword sheath was scratch-built using leatherette. The sword was borrowed form the two pack Arrow/Deathstroke(technically Wintergreen) figure by DC Collectibles. The rest of the weapons are from the Revoltech Snake and various figures.

There you have it. I hope you like it! :D