I never did get around to watching Avengers 2 (it looked kinda meh), but everything I've looked at seems to indicate that there was no Loki in the film, so I clearly lost the bet.
So as much as I'd like to weasel out of it, I owe you $50, ScytheRexx.
I'd link the post directly, but apparently I'm not a member here anymore.
You take PayPal?