I wouldn't believe a word of it if this whole thing didn't start from Devin at Badass Digest, who, again, is one of the most solid, in-the-know guys out there, who also doubled-down on the rumor a couple days ago after having talked to sources at Comic-Con. He admitted that he was off in certain regards, but sticks to the gist of it.
Still, this all feels so suspect, for all the reason pointed out in this thread. I have no doubt a lightsaber-in-space may, in some way, be PART of the opening, but the way people continue to (try to) describe it, there's not a chance in hell that version ends up on screen.
[This message has been edited by TCTTS (edited 7/25/2014 3:17p).]