One of the things that I absolutely love about Reshiram and Zekrom in Black & White is that they're a huge part of the main story(In Black and White 1 specificly) instead of being just an optional catch that you can do after beating the game....I liked catching ReshiramZekrom before the final battle with N and I would be happy if Xerneas and Yveltal would affect the story of X&Y in a way similar to Reshiram and Zekrom or better.
One of the things that I absolutely love about Reshiram and Zekrom in Black & White is that they're a huge part of the main story(In Black and White 1 specificly) instead of being just an optional catch that you can do after beating the game....I liked catching ReshiramZekrom before the final battle with N and I would be happy if Xerneas and Yveltal would affect the story of X&Y in a way similar to Reshiram and Zekrom or better.