Hand guns should be universal for deathstroke. They can base his 3 variations on.
1. Broad sword and rifle( similar to injustice 1)
2. Staff variation( he can shoot energy blasts from staff in addition to Melee)
3. Dual katanas
For Wonder Woman, lasso and physical moves such as Amazonian smash, Amazonian uppercut and straight smash should be universal.
Variations
1. Bullets and bracelets
This variation gives Diana access to parry/reflect, love guns and various weapons she can summon from her bracelets. Also the bracelet shockwave thing from movie.
Take a look at this link to see how these weapons work
http://www.the-fanboy-perspective.com/wonder-womans-weaponry.html
2. Archaic
In this variation Diana has sword around her waist and shield on her back. She uses shield and sword when special move or combo string requires her to. Similar to kotal kahn's giant sword, Bo rai cho's cane and scorpion's ninjutsu swords.
3. Cuffs off
In this variation Diana is not wearing her bracelets, her skin is glowing with blue energy and her lasso is on fire. This variation gives Diana more rushdown and combo options. She can wrap her lasso around her fist smash the ground to cause fire explosion and whip the ground to set it on fire.