Whats the best thing about San Diego Comic-Con?
And, this years batch did not disappoint.
When season 3 ended, Caitlins (Danielle Panabaker) future was up in the air.

Credit: Dean Buscher/The CW; Robert Falconer/The CW; Dean Buscher/The CW; Bettina Strauss/The CW
Well, this new trailer shows her back at S.T.A.R.
Labs working with Team Flash, which is great news forThe Flashfans.
The Flashreturns Oct. 10 at 8 p.m. on The CW.
Arrow: Slade made it off the island!
We walk in two worlds.
We can only do that for so long, says Slade in the trailer.
Arrowreturns Oct. 12 at 9 p.m. on The CW.
The decision I made, he couldnt have made that sacrifice.
But me, I couldnt have lived with myself if I hadnt, she says in the trailer.
I will always make the decision I made.
I am not a human.
I tried to be, but Im not.
Kara Danvers was a mistake.
That last part should give allSupergirlfans pause.
Hopefully, Kara realizes thats not the lesson she should take away from last years conflict.
Supergirlreturns Oct. 9 at 8 p.m. on The CW.
DCs Legends of Tomorrow: A great evil is coming…
So, in season 3, theyre focused on righting whats wrong.
Rip has been hiding something from us.
Theres a greater evil coming.
As Sara says that, were shown our first look at Kuasa, Amaras great granddaughter.
DCs Legends of Tomorrowreturns Oct. 10 at 9 p.m. on The CW.