The Superherohype forums are convinced we are getting something on the 25th because its officially a year until release.
The sooner we can accept that we're likely not getting anything til comic con (not that WB has to wait that long), the sooner we can be at peace with ourselves.
Avengers is almost here, that should be glorious, then the stars will be closer to alignment, and the sun will finally bestow us with a trailer for BvS.
Putting the trailer out after Avengers gives BvS virtually zero competition until it comes out. Sure, Star Wars will be massive, but it's just different enough to not matter.
Also, anyone ever think about how we'll have a Civil War trailer not too long after.
Ultron marks the beginning of a year in which we're basically getting everything we could've ever ask for.
Ultron, Star Wars, BvS, and Civil War all within a 12 month window.
Life simply put, is amazing right now if you're into this stuff.