The Black Flash mantle was taken up by both Barry Allen and Professor Zoom at certain points, so thats always something we might be able to see in the future.
The main source of conflict in The Flash Season 2 came between Barry and Zoom, the menacing Earth-2 superhuman with 1,000 different goals pertaining to stealing speed and destroying dimensions.
The Flash will return to The CW this fall, hopefully with Jay Garrick back for more and possibly with Hunter Zolomon taking on the umpteenth new name of his villainous career.