Update: 18:50 As a lot of you have speculated, the space between the LA and X is important :)
Update: 17:50 For those asking in the comments, yes this is the CONFIRMED title for the episode.
It appears that in the new "ARG" that the Episode Title of the Season 6 2 Hr Premiere has been released. It's called "LA X".
You can follow our coverage of the "ARG" here.
Thanks to SpOOky from the forums for these screencaps.