A buyout of Pegasus makes a lot of sense to me which would explain the insider trader concerns. Pegasus territories are a D* weakness at this time when it comes to competing with E*, if D* buys the Pegasus territories it would eliminate that biggest weakness.
Adding some of the Sports pack channels to TC+ would make this package even more attractive to some compared to AT180, however to get TMC which is also included in AT180 you would still need to add the the Showtime Unlimited pack and to get the Encore channels which is also included in AT180 you would still need to add the Starz Super Pack, adding more sports to TC+ would not make Charlie's head spin, he probably would not even notice.
Another possibility is that D* is going to announce their latest hardware promotion, which has already been rumored to be a Free D*DVR w/Tivo or D*HD receiver upgrades. Not earth shattering but would match the E* new customer promotions.
I too doubt their will be any new HD channel announcements tomorrow except possibly the Fox HD in O&O markets because 7s needs to go up first to make room for more HDTV channels or even any new SDTV channels beyond maybe 1 or 2 new SD channels. Making WWOR available to markets that do not have a local UPN would be nice since NewsCorp owns this station, this could possibly happen but by itself would not be Charlie head spinning news. Also their is a rumor of D* going to a $4.99 Flat fee mirror charge for all additional receivers on an account, this would be nice if true.
What would be truly a Charlie head spinning announcement on Monday is if D* would announce all or most of the above

.