I don't know how to start this, so, I'm just gonna start this!
Da Rules/Terms & Conditions:
1) There may or may not be profanity. You have been warned.
2) I'm writing this article with The CW's '[Arrow](series:720988)' & 'The Flash' as well as CBS' 'Supergirl' connected to TNT's 'Titans'.
Let's jump into this list, shall we?
#5 The Fearsome Five:
I think this is a reasonable villain choice. I would love to have Jinx, Mammoth, Gizmo, Psimon & Shimmer. Little fan casting, I would die for Vern Troyer to play Gizmo. I know Vern is in his 40s, but since it would be an adaptation of Gizmo, should age really matter for a character this small (no pun intended)? Plus, with how Gizmo is an inventor & an adult, Vern would be perfect. But back to the article.
A BIG villain in the Titans comic book lore. I think Trigon could be a season long villain kinda like how Darkseid was in the last season of Smallville; makes quick cameos throughout the season & during the finale, finally fights the team.
#3 The Light:
I will admit it, the build up to the reveal of The Light in Young Justice was very well done. I would have The Light be like the 3rd or 4th season of Titans so, by then, enough villains could be introduced that the roster could be filled with good choices. I think Deathstroke might be a good choice, maybe Ra's al Ghul, Mongul/Mongal & whatever other villain WB/DC would want to use.
#2, died last year in the comics, Doctor Arthur Light:
Another big villain in the Titans lore, but recently was a member of the Justice League of America before being killed by Superman. We have gotten an Easter Egg to Dr. Light in Arrow episode #219, "The Man Under The Hood" when Cisco & Caitlin mentioned how Light was fired from S.T.A.R. Labs for 'being a psycho'. So, having Light being in the series isn't unrealistic.
#1, THE Titans villain, Slade Wilson/Deathstroke:
If you paid attention to Arrow episode #304, "The Magician", Merlyn talked about how he can escape any prison he is sent to, how no prison is inescapable, even his 'on Lian Yu'. Which could mean 2 things, Slade has escaped on his own through his own power, or the League assisted Slade in escaping Lian Yu. But then again, it could be a little Easter Egg for, & I'm reaching with a 20-foot pole, the future of the series where we find out what happened to Slade after Amazo-shank. Could Slade have been picked up by the League with Sara? Then we can argue about why did Slade get surprised when he saw Sara walk down the steps of the Queen Mansion in episode #215, "The Promise"? Well, the way I would have it, Slade & Sara concoct a plan to escape the League. During the play out of the plan, Slade & Sara get separated & it looks like Sara dies once again leaving Slade to finish his escape. Come on, Sara is the Queen of fake dying, so having her "die" for the second-to-last time wouldn't be that bad.
That's it... that's the article... I... uh... I guess I'll be back later for more stuff, I guess? Quick little article... Bye...