Why I think The Dark Knight Trilogy Might be connected to Batman VS Superman? Well it's because of very obvious clues that are hidden through out Man of Steel and the images and trailer of Batman VS. Superman.
1. Wayne Enterprises logo identical to The Dark Knight Trilogy in Man of Steel.
As you see the Wayne Enterprises logo is exactly the same as in the Dark Knight Trilogy. That'd may be the biggest clue there is but I've found better.
2. The Joker in this movie was spawned by the Joker in the Dark Knight and this Joker's true identity is none other than Jason Todd. Batman's former sidekick Robin.
As you can see my theory really does prove a point. This Joker A.K.A. Jason Todd may be have been created by The Joker in The Dark Knight before he dies to continue on his legacy of torturing Batman.
The last time we saw The Joker he was hanging a top of a building in Gotham right before getting taken into custody. So no he's not dead which could mean he could have turned Jason Todd into the next Joker.
Make sure to read this other Movie Pilot article that also might have proof that this might be true after all. Click here to read it.
Conclusion: So Yes Jason Todd is the Joker I know that it's my 85% guess.
I hope you enjoyed this article. It's my first ever so comment if you liked it! Thanks!