Because of the holiday weekend, it’s an exceptionally quiet Sunday night for television – a temporary condition that, I assure you, will be corrected by this time next Sunday. But for now, tonight’s slim pickings include this ABC Fall Preview special, which highlights the new and returning ABC series. In some cases, this is less treat than trick – especially in the case of The Inhumans, the new ABC Marvel Comics series that premieres later this month on the network, but on Friday began a two-week special showing at Imax theaters nationwide. I attended the first preview showing, and all that’s accomplished by the giant screen and booming sound of the Imax system is to magnify the painful flaws of The Inhumans –already the show to beat as worst new TV series of the fall.