I actually made an account just to post this when I heard the announcement, lol. I've bought games from you guys in the past and I've enjoyed that fact that you stayed true to their original source material in terms of atmosphere and feel. I also like that y'all actually read these forums and take things we say into consideration. :p
However, like many others here, I felt a slight sense of unease when I heard this announced (and a great deal of excitement!). As a loyal fan of the series, I'm extremely happy that the series is getting its first official game since 1998, but I'm also worried it won't get proper treatment since all your previous games have had a very distinct style to them. I'm sure all you at Telltale have realized that most of the old fans feel the same way and you've taken it into consideration, so I don't mean to insult your intelligence with this list; I just need to vent and know that I got this out there somewhere. :)
1. They need to feel like the old games: A very broad statement, so I'll try to clarify. A moderate amount of camp, but not an excessive amount. And please, please don't overextend into trying to make it more dramatic like The Silver Lining.... unless you've got a truly phenomenal script for any game you decide to take that approach with. I've enjoyed their game for the nostalgia, but it doesn't feel like a true King's Quest game to me. It's taken a very strong "Tell, don't show" approach in terms of explaining the characters and story, and all that translates into is a lot of cheesy dialogue followed swiftly by a facepalm. That aside, the same style of humor being present is very important to me. And, just saying - a great way to maintain a similar feel is to get some of the original voice actors. A lot of them frequently come back to do work on fan games, particularly Josh Mandel (the iconic King Graham).
And I can't stress this enough... make sure the narrator doesn't suck.
2. I don't want to play the same games over, except in 3D: I understand you want to try to appeal to new gamers as well as pleasing the old fans, so this shouldn't be too much of a problem. So please, feel free to take a lot creative licence with these games. Change up the stories a little bit (as long as they're still good), make completely new dialogue, come up with lots of new puzzles, etc. Just be sure that the style does justice to the traditional games and that the characters are essentially the same people.
3. The puzzle logic needs to be the same and there needs to be an adequate amount of ways to die: A lot of people have exaggerated how often you could die in the old games. Besides the obvious falling off cliffs, there wasn't literally a death on every screen. But at the same time, we shouldn't really feel safe when playing a King's Quest game, which is another problem I have with The Silver Lining - it's really obvious when I'm safe and when I'm not. It shouldn't ever be like that.
4. Inclusion of The Black Cloak Society: The only real loose end in the series and the main reason most fans haven't felt closure (aside from the poor job done in KQ:MoE). Whether or not you guys explain it in these games or choose to explain it in any potential future sequels, I don't really care. Just a mention of it would be great. :D
So, that's the end of my little rant. I'm looking forward to seeing the results and I'll surely buy it regardless of what I think from any previews we get. If all turns out well, then who knows? Maybe we'll finally get an official conclusion to the series we all love. :)