I'm not disappointed regarding Scott. I did think there could be a possibility of Marsden coming back somehow. Perhaps that still might be the case for future films. I suppose it really depends on how much the time traveling aspect of Days affects the entire mythos.
I keep telling you - he's a captive in Mr Sinister's lab. How else will they milk the legend of Cable in his own spin-off?
I'm disappointed at anybody who is missing. I still want a picture and/or action figures of a full set of movie characters in uniform so I'm still missing Kitty, Warren, and Kurt.