Alright, here's my take on things:
1.) We'll get the new Emrakul in campaign-mode only, where they can put a tight leash on coding the ability.
2.) Ulrich is good and you guys are kidding yourselves. Skipping your sorcery-speed spells to kill a 6- toughness creature is often going to be a valid play. Let your opponent flip him back to attack profitably with some mook on the next turn when he gives them +4/+4. The only reason Ulrich isn't amazing is due to the love R/G has been getting overall in Duels.
3.) Hanweir, the Writhing Township really seems like it should start as a land, but the collector number is all wrong for that. 130 out of 205 seems pretty late for a white card too.
4.) Lovecraftian horror is fun, but don't sweat it: we might get gothic horror back after the Jacewatch come to help, and then Liliana has to fix the mess they make.
5.) Speaking of planeswalkers... we'd **** well better get a new version of Tamiyo who is freakin' awesome. She's too cool to leave on the sidelines. #NewBlueWalkers
6.) There were two articles this week about "going big," so I think I might be on the nose with predicting a return of "battlecruiser Magic" like they had during Rise of the Eldrazi. They've learned some lessons since then, so I bet we can also go wide with zombies and humans, and maybe evasive with spirits or even vampires. Werewolves, if anything, could just get fatter until they have eldrazi-like proportions. I could be way off base here, but it's what I'm predicting for now.
7.) The new Emrakul effectively has "affinity for delirium," so I think we're going to be seeing plenty more of that mechanic coming around.
8.) With #7 in mind, I will tentatively predict a good, usable artifact creature with a built-in sacrifice effect that makes
Bottle Gnomes cry sweet, blueberry-flavored tears.
EDIT 9.) I like the female narrator's voice in the trailer, I think she could be Liliana in a radio show for sure.