I don't have a source but I saw it was $300 million per film.
ETA: If it is $1 Billion for both then I personally would boycott them. Way too much. Ugh.
Sure it's a lot of money, but I'm not about to boycott, even if they did spend that much. There are better things that could be done with that kind of money, but it's their money to spend so if want to spend it there I'm not going to punish them for it.