One of the things that is perhaps more manifest in my experience in the Orthodox Church versus the Lutheran Church, at least to the laity (I cannot speak for you pastors out there), is the distinction between Χρόνος and καιρός. Since hell would presumably fall in the realm of καιρός, and heaven certainly does, I think "forever" is probably a concept that doesn't really apply.
It strikes me as being like people who ask "well, what was here before the Big Bang." The question doesn't make sense, because time, matter, space and energy began with the Big Bang. My favorite response, borrowed from someone whose name I should remember but I don't, is "here wasn't here then, and then wasn't then then.