Speaking of bleeding, what if Pony VS Pony's universe decided to invade DF's? I expect it'd elicit the same response from NPCs as from players.
The two things I most anticipate are classes (Specifically Fleshweaver), and storyline quests in general. With that in mind, I'm hoping the next two releases help progress the storylines (Lucky Day already cut into the sidequest timeslot as it is). 12 main releases per year really isn't a very fast story progression... and the remaining 12 being divided among the volunteer storylines-- especially with ambitious, curiosity-inducing questlines like the Six Heroes-- is a little strenuous.
Due to this, I'm actually hoping there won't be a war. Even if it saved time (though a war seems like at least as much work as a normal storyline quest), the story is equally important.