Wonder Woman (two weeks before/after):
June 9 - The Mummy, World War Z 2
June 16 - Kingsman 2
June 23 - Wonder Woman
June 30 - Despicable Me 3, Uncharted
July 7 - Spider-Man
Justice League (same window):
November 3 - Thor
November 10 - Nothing of note
November 17 - JL, Dr. Seuss' How the Grinch Stole Christmas
Nothing of note until Episode 8 on December 15
I wouldn't be surprised if Wonder Woman gets move up. If BvS pulls in huge numbers moving Wonder Woman to March might be better. Wolverine 2 hits at the very beginning of March. Put it two weeks after it and it would have a few weeks before Fast and Furious 8 dropped in the middle of April. Being booked ended by Kingsman 2 and Spider-Man with them being so close is going to hurt. Wonder Woman might be better off with more breathing room. Moving it to July or August puts it to close to Justice League.
WB is already looking at months outside of the summer. Before and after to avoid the crowd. It should keep doing that and maybe keep it's films out of the summer. It's being proven more and more you don't need to keep your film in those summer months to pull in huge amounts of money.
I'm really curious as to see how this summer turns out with so many big films releasing right on top of each other in the summer.