They've already touched oncreepy merfolk but they could do it again, focusing on the Deep Ones' hybrid nature, like Creature - Human Fish or Human Mutant, possibly on DFCs.
Also, Medusa heads, because there's nothing scarier than the ones that petrify you and drop you into a pit.
I can definitely see some Odyssey mechanics returning since I believe Maro said something about such graveyard mechanics being wasted on a set without a suitably dark setting.
If this was a movie or show, what I'd be hoping for, storyline wise, is that after this fairly pitched battle between the Mirrans and the Phyrexians, with them going at it and seemingly evenly matched, the Mirrans finally manage some victory that tips the war in their favour... only to have the first of the Phyrexian portals opening bringing the real invasion force through, since all we've seen so far is the early beachhead
Phyrexia is destroyed, and Mirrodin being the potential New Phyrexia implies they don't have some other plane completely corrupted.
I'm really surprised they're not doing faction promos again, after last game day and the prerelease. There'd be a bigger incentive to play an affiliated deck now, and it should be a lot more fun now with two sets to play with.
After a rigorous evaluation, Wizards of the Coast has decided to eliminate the Magic Player Rewards Program. It is important to us to provide you, the player, with the best possible Magic: The Gathering experiences. In this case we are redirecting these resources to increase our player support for local organized play programs.
The December 2010 mailing will be the final MPR mailing and will include extra cards in addition to the cards you would have normally received. This mailing will encompass all reported tournament activity through November 15, 2010. We appreciate the dedication of our fans and look forward to providing new and exciting Magic play experiences.
Because of the Planar Overlay of Bant and Esper
Also, Medusa heads, because there's nothing scarier than the ones that petrify you and drop you into a pit.
Phyrexia is destroyed, and Mirrodin being the potential New Phyrexia implies they don't have some other plane completely corrupted.
Karakas is banned.
1 more for instant speed seems like a good deal.
After a rigorous evaluation, Wizards of the Coast has decided to eliminate the Magic Player Rewards Program. It is important to us to provide you, the player, with the best possible Magic: The Gathering experiences. In this case we are redirecting these resources to increase our player support for local organized play programs.
The December 2010 mailing will be the final MPR mailing and will include extra cards in addition to the cards you would have normally received. This mailing will encompass all reported tournament activity through November 15, 2010. We appreciate the dedication of our fans and look forward to providing new and exciting Magic play experiences.