Hello , let me get straight to point ..... check out the image below.... it is a screen shot taken from the Legends of Tomorrow trailer that released a few days ago.
We can clearly see that it is Eobard Thawne in his reverse Flash suit ..... oh and he is in a freaking time machine.
What could his role be in the upcoming series ?
Now this could mean that he could go into the future as he could not have gone back with Barry's help and is going to go to the future, back to his timeline or he is going to use it to do something evil, or he is using it from the future to come back to the Barry's timeline.
Well whatever it is, it seems like he is going to be a part of it.
Dc's Legend of Tommorrow is coming in 2016.