Over the past couple of years I've become a huge fan of Deathstroke, mainly because of Manu Bennett's portrayal of him in Arrow. I recently read an article on here by James Thomas that said Arnold Schwarzenegger should play him in the Suicide Squad movie as an enforcer to the squad. Since I'm already a huge Schwarzenegger fan, that sounds AWESOME!
But I also believe that there are other worthy candidates to play him such as:
1. Stephen Lang
He definitely has the look to portray him. He also is a very talented actor and has proven, as in Avatar, he can be very intimidating.
2. Manu Bennett
Now obviously, this is who I would go with. He did an amazing job with the character and I couldn't have picked anybody better to play the part. But unless DC is planning on tying in their cinematic universe with Arrow, it's not going to happen (heart shatters).
3. Oded Fehr
I believe Oded Fehr is one of the most underrated talents in Hollywood. I believe he did an amazing job in The Mummy and The Mummy Returns. He was the only part I liked out of any of the Resident Evil movies. He has proven that he can do action movies time and time again.
4. Ron Pearlman
He has proven that he can handle playing the hero or villain in comic book movies as he did in the Hellboy movies and in Blade II.