User blog comment:Worldsfinest89/Some Artemis speculation/@comment-5458789-20121009012929/@comment-1038387-20121009164840

Slade is used, but not as much. It's his first name, so only people who know him use it. What Btgr, and many more here (including, I'll admit, myself) have against calling him "Slade" is that this isn't Teen Titans.

Weisman has called him Deathstroke, so from the looks of it, they'll call him that.