About the templates etc. I don't really want to turn this into some official Activision letter bombarding campaign. I think that would be kind of obvious to them who orchestrated it. This isn't intended to be a show of might. The idea is to just write to them in an naturally flowing way, as I think it would be ineffective if a sudden stream of feedback seems flowing in, solely for the benefit of AGDI (or whoever else). A little coincidental, no?
What I'm talking about, is legitimately contacting Activision and speaking from the heart. If you feel TellTale should be the ones making the Sierra Quest games in the future, and believe that they have the ability to pull it off in classic Sierra style to the complete satisfaction of fans, then by all means tell Activision that you think all future Quest games should be episodic 3D titles. But if you prefer self-contained stories, fantasy artwork, and wide lands and lush landscapes to explore, and if you don't mind 2D graphics, and if you'd like to see either remakes or original titles in that style... tell them that instead.
If it turns out most *Sierra* fans actually believe these franchises are in the best hands with TellTale, then I'd accept the overwhelming Sierra fan-base's decision and concede that that's what Sierra fans want. You can't argue with that, and if you try to force though and win, you'll be making a product that Sierra fans don't want and probably won't like.
On the other hand, if most Sierra fans are wary of TellTale potentially turning the Sierra games into something they're not (as I suspect many are), just know that you don't have to stand there and watch it unfold that way. You have a voice, so speak up and tell Activision what you would like to see! As I said, now is a time Activision seems very receptive and are actually listening; opening up about doing new things with the IP. You only need look at Sarien.net to see that. Of course, we'd love the opportunity to do more Sierra remakes or sequels commercially and legally, but it's almost a David and Goliath battle when going up against serial-IP-snatchers with millions of dollars. Companies like us need to side with the fans to use the angle of giving them what they'd want in a game instead. But the only ones who can turn the situation around and ensure the licensing goes towards people who will do it justice and treat it with respect are Sierra fans. I can't (and don't want to) orchestrate something like an artificial-feeling campaign. People should care about the games enough to be able to construct their own thoughts and simply let Activision know their feelings. All you have to do is sound level headed and not speak badly about any one company and you'll do fine.
Heck, you don't even need to mention anything about AGDI or any other development group to Activision. Just let them know the type of gameplay you'd like to see in Sierra adventure games; what kind of graphical style, what kind of game mechanics and so forth. They'll soon draw the obvious connections if they hear enough feedback.