I share your concern about negativity. Fostering a positive atmosphere is everyone's responsibility in an internet forum, and for most of us, myself included, it seems to take conscious effort. I see you making that point in several comments over the past week and I don't want you to feel like you're shouting into the void.

About these previews specifically, unfortunately I have to say I'm in agreement with most of what's been posted here so far. Some of these concepts are so far from what I want out of Magic that it actually doesn't matter how good the art or gameplay are. For Fallout and Assassin's Creed, as for The Lord of the Rings, I liked and have fond memories of the source material -- and if I want to relive that experience, I'll go back to them. I don't understand the appeal of shoehorning such incongruous settings into Magic. I've sat out the LTR Magic set and I expect to do the same with future UB stuff.

Any time period from about the Industrial Revolution onward feels wrong as a Magic setting to me, and for most of Magic's history they didn't cross that line. NEO has some fun mechanics and I understand that the design team had to do something radically different in order to convince the suits to let them go back to Kamigawa, so, okay, it gets a pass. I wasn't playing when SNC was new so I'm mostly neutral about it. I guess I'm saying, I'm willing to be flexible about time periods but I'd still rather see newer eras be a rare exception. A Wild West setting... I'm not confident in their ability to make it feel like Magic, but I'll reserve judgment until it's here. Bloomburrow is definitely the most interesting thing in this graphic to me (and it's a year away).

Ravnica Remastered... I'll buy some of it, I'm sure, but I'd really rather they re-release the original Ravnica sets (and all pre-Arena sets) unchanged, and the more they do stuff like this, the less likely that becomes.

As someone who drafted MH2 and does not play Modern because I already thought its power level was too high, I actually enjoyed MH2. I gather that Modern players, however, are not fans of how its overpowered cards are now running the format. The MH3 announcement seems like Wizards is rushing to repeat that mistake. We'll see how it actually shakes out, I guess, but 30 years of history suggests that Wizards has no idea how to rein in power creep and isn't particularly interested in trying. Personally, I'll draft MH3 if someone else is paying for it but I assume it's going to be north of $300 for a draft booster box and that's way out of my price range.

I know that when I see Magic announcements I'm not interested in, I'm supposed to say "this product is not for me" and move on. But there's got to be a limit to what percentage of products you can say that about before you conclude that the entire game isn't for you. I'm obviously not there yet, but I'm frequently asking myself how close I think that line is. I think that's the fear underlying a lot of the negativity you're seeing in these posts. Some people have been with Magic, supported it with their money, time, and/or work, for 20 or 30 years and now it feels like Magic doesn't care whether they still like it or not, because there's money to be made.