* Deathstroke (Slade Wilson) is a highly skilled mercenary and assassin with enhanced strength, speed, agility, and healing abilities. He's known for his strategic brilliance and ruthlessness.
* Deadpool (Wade Wilson) is a mutated mercenary with a healing factor, superhuman strength and agility, and the ability to break the fourth wall. He's known for his irreverent humor and chaotic nature.
They have both been involved in the same storylines and teams occasionally, but they are not related in any way.