https://www.youtube.com/watch?v=6eaK60YLCGU&feature=youtu.be/
YOOOOOOOOOOOOOO
Comes out on my mum's bday...stuff.
EDIT
Blue guy is behind Riddler when he dies,in the crowd at the mansion and behind Dallas.
Blue Guy =
Illuminerty Confarmed Here's a list of candidates
Dentist
One of the "Crew"
Bain
Other Contractors (less likely but Elephant possibly)
Blue guy is just blue guy?
Darkness (Clover says wherever it goes darkness follows)
Riddler's 2nd in command (Not sure how he could live that long though)
Clover
Cloaker (less likely due to green nvg having small green eye at top + green)
New enemy type
The Guy from Agents of S.H.I.E.L.D.