Assuming (which is no guarentee) that the pattern of 5 figures with one villain is a template, here is my best "Guess" for Wave 2:
Flash
Wonder woman
Green Arrow
Martian Manhunter / Firestorm (tie)
Darkseid / Luthor (tie)
Allright, I couldn't make up my mind on the last two but, hey, I never said it would be easy. You could make a good business case for either villain, and either of the two "B" level heroes I listed might be too obscure (can you say short packed to a case?)
Anybody care to offer their speculation/guesses...
It's all fair game until Wave 2 is announced ...





I spend my time studying, playing basketball and collecting a bunch of Funko wobblers, pops, Dorbz, blox, vynls... IG: hoopsgirlfunko

