What do you think it will be? They've hinted it will be something big. You can look at the map here:
http://www.comic-con.org/cci/cci_exhib_1.php
Yes, apparently la/bioware is going to have a presence at comicon bigger than dc, or marvel. So what do you think their announcement will be, and I'm curious why they would wait to announce stuff at comicon instead of e3? Then it kind of hit me. How many other mmo companies do you see there? Maybe you can count the sony area, but pretty much they are it. So if they announce anything to do with swtor they will be guaranteed no other lame game company can upstage them.
By the way, there is something I find interesting. Both Bioware, and Lucasarts are listed differently there. Yet they share the same space, and the area for them is covered by the LA while not sharing the same area as EA. I wonder if that's more about associating SWTOR with LA and distancing itself from EA?
I could be way off, and that could just be some tinfoil hat conjecture. Either way, I am looking forward to seeing it on g4.