In the season finale of The Flash, Barry Allen has to travel back in time to save his mother. Barry and his team, along with the help of Eobard Thawne, try to figure out how to get Barry to travel back 15 years into the past to the night of his mother's death. To do this Barry runs through the "Speed Force" which according to Eobard Thawne is when you see "Your past, your present and your future all at once." When Barry is running through the "Speed Force" images pop up and some might give hints into what is to come of The Flash.
This first image we get a glimpse of Killer Frost. Killer Frost is a villain in the DC universe who has the power to control ice. This version of Killer Frost does look like Dr. Caitlin Snow but we will just have to wait and see until season two.
In the second image we see a Flash Museum with a big gold statute of him in front of it. This indicates to us that The Flash is going to become very popular in season two and we're not sure if this is good or bad.
In the third image we see Barry handcuffed in jail talking to someone. He has even got a prison jump suit on with the letters HP which I'm assuming is going to stand for Iron Heights Prison. This could mean that something really bad could happen in season two.
In the last image we can see a snippet of film taken out from the Legends of Tomorrow trailer with White Canary, Captain Cold and The Atom. (Trailer is down below if you haven't already seen it)
I would also like to bring to your attention that this girl was shown in that last scene of the season final episode and that she could have the biggest influence on season two. For you who don't know who she is, this is Hawk Girl, and she too is in the trailer for Legends of Tomorrow. (Trailer is down below if you haven't already seen it)
Also in this episode we see Jay Garrick's helmet appear. For anyone who doesn't know who Jay Garrick is he was the original Flash in the DC Comic books. We don't know why his helmet was there or why it was a queue for Eobard Thawne to leave but there are rumours that this could mean there will be more speedsters in season two.