That really sucks that it was leaked a month before going into theatres. I feel for the people that worked on this film and they are losing money and this film probably cost a way load of money. I'm not going to watch it online and go watch it at the cinema. And nobody here should watch in online because it's wrong!!!
The copy that got leaked is a workprint. It's missing a lot of the CGI, special effects and last minute reshoots. So even if you watch this, you're still not getting the copy or quality that is going to be in theaters.
Personally I'm avoiding watching the leak because I don't want to ruin the story/movie for when I see it in theaters.