My old TickerForum friend Lunatic_Fringe always liked expanding ascending wedge shapes at major tops, so I'll propose one here. This one could pop as high as 1528, where we really have the last trendline from these massive bearish wedges we have been building.
From a top at 1528, the .382 retrace to 666 is 1208, which may be a good first target for a wave 1 on the way down. I'll poke around with the 1528 area to see if there are any fib extension levels from other waves that land near it.
[Actually, the 1.236 fib extension of the move from 1398 to 1502 (assuming it holds as a swing high) is 1526.5.]