When was the Leia vs Luke battle confirmed? From what I know it's going to be much more complicated than that. Regarding a huge cast of new characters. From my understanding there will be an amazing saber battle with Luke but not without consequences. Luke has become more force sensitive and needs to isolate himself. There are rumors that he can feel the force around him and has a deep connection with the force. In other words he in theory has surpassed Yoda himself. I don't think he's on his way to the dark side but if he can use the force to know everything in the past present and future he may try to prevent one of those dark outcomes and that could result in some drastic consequences. A huge misunderstanding that could trigger a fight with someone he once held dear.

In other words Luke could appear to be the villain but when in reality he is still a hero. The knowledge he has gives him the power to prevent disasters and he may trigger a chain reaction.

I am glad that Planet is not Tatooine either. They have been saying that for a while though. then again that was just a rumor and speculation.

Yes Episode VII is a canonical successor! However with that in mind Disney has scrapped the whole EU stuff for a freash start and more "creative control". Anything after Return of the Jedi is no longer cannon unfortunately. Thrawn Trilogy and Legacy of the Force are gone now. That being said there are elements from some of the EU content that will influence the films. J J. Abrams knows what he is doing. He has a been a huge Star Wars nerd since he was little boy! So I trust that he gets this one right. For him, this is like if you were given a change to work on your favorite IP! Abrams dream has come true.

 There is a HUGE rumor that Mara Jade will make an appearance in the film. This is a huge rumor that has some evidence backing it up due to the Star Wars Rebels toy lineup. This should be taken with a grain of salt.

What really? Are you serious? He was one of the first cast members announced! They said the original cast was returning from the get go. Luke is the one narrating in this new trailer. Han will be in this film, but from my understanding he will not return for the rest of the trilogy. Luke and Leia will likely stick around but Harrison Ford wants out. I have a reason to believe my sources but if standed correct, Hans fate will shock and rock the whole world! It will be a very lasting impact to long time fans of the series and will shatter the characters in the film. Rumor has it his death is what triggers one of the new characters to embrace the darkside.

PS. How do you do the spoiler tag on this site? I think I am in a deep need to know if I am to continue talking about this movie.