Well, it's to be expected since this is celebrating both the Anime's 20th anniversary and Movie 20.
The movie, as always, won't really have any "significant" value since they aren't canon to begin with, though we might get a pre-canon reveal with Rum like we did with Akai for Movie 18 (I doubt that to be the case though). Looking forward to the promo tonight!
I'm still a bit torn on the special from when I first heard of it. It's portrayed as a one hour special, but really it's just a two part anime original? I suppose it features a famous actor, and I'll judge it for its quality after I see it, but it seems a bit disingenuous to me.
Curious to see the remaining 17 surprises. This thread on chinese forums has been pretty up to date with each surprise release: http://bbs.aptx.cn/thread-292560-1-1.html