Quote Originally Posted by FrankTheHedgehog View Post
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Appearing in an H game might tank their rep
Kadokawa did this cross-over event over one year ago on DMM.

Besides, Haruhi is a dead franchise. The author doesn't write more Haruhi, which means that it is pointless to make more anime of it (since the only point of anime these days is to advertise for the highly profitable manga and light novel industries).