Lex, Hawkgirl, Superman, Flash, and GL imo. Since they are better than 99% of the players online I actually used vhard cpu to learn those match ups lol. Injustice on vhard reminds me of MK2 cpu where you lose if you tried to fight them like a person so you had to use this pattern where you duck and then jump back to make them jump to uppercut/use a special move on them. Except in Injustice there is no pattern, you just have to find the places where you can poke or b3(mb) out of attacks.