I will start by saying I am a big fan of the new logo if that leak is infact it.. if thats not it I'm sure I will love the new logo regardless because of my bias as a fan of the team, any logo will probably grow on me, but here is my thinking on the logo leak.The simple plain white and black colors bring a real simple classy look to it with a modest flash about it, very sharp look.
Another point if they can make nice jerseys maybe with pinstripes their look will help associate them more with the yankees than other juvenile looks teams have with lots of bright colors like a children's cartoon.
Also marketing schemes often take two or three things they would like to focus on and build around there from that, Im not saying this his how they were designing things but I think there is a good opportunity with this logo to branch off and help popularize their merchandise, (not just jerseys with brooklyn across the chest, those should be popular by default) but also other possible avenues, for example baseball caps.
Every so often new caps become the "in" style but it is usually a simple classy look for example the cincinatti reds cap with the big "C" I'm not sure about numbers in sales or whatever but just from first thought and how often I see those they must be one of the more popular caps around, and seem to be popular in celebrity circles, Brooklyn with a classic yankees print "B" has that same potential to be rocked by the right people (celebrities wearing merchandise is a very successful avenue to market things).
So the "B" could actually be one of there main things they are marketing around as it has that iconic potential to it, the jerseys should definitely have Brooklyn written out in full and hopefully they can find some places for a BKN abbreviation but for those of you who preferred BK or anything else over B while i really don't think you can go wrong with any of them I do like the classy "B" and think it has lots of potential, for caps or other merchandise or branding.
Anyway there is a lot more I have to say about the logo and colors that I do like but due to the time, and the fact that they are not for sure the colors or logo I will save them for another time, just wanted to share some of my insight about this and maybe make some of the fans who don't like the designs feel better about it.