Which of these characters will appear in SGU's SEIZURE? (MGM)

Not that long ago, Stargate Atlantis and Stargate Universe co-creator Brad Wright revealed that characters from Atlantis will be making appearances on an upcoming episode of Universe in Season Two.

Executive producer Joseph Mallozzi gave fans a lot more information about these appearances in his weblog entry for July 15, 2010:

With word from producer John G. Lenic that the deals have been closed on those Atlantis alums, we can now move forward on the script, secure in the knowledge that both extra-special guest stars will actually be on hand to say the dialogue written for specifically for them. Great news for fans of the old series. There was a reluctance to move ahead with an SGA crossover, particularly on my part, because the feeling was it would step on the timing of the SGA movie, Stargate: Extinction, the events of which directly proceed the Atlantis series finale, Enemy at the Gate. But given the delay on the movie front and the ideal premise pitched out by Remi Aubuchon and Brad Wright, it was decided to go ahead with the crossover. Not a big deal, but it will require some changes to the Stargate: Extinction timeline which, in turn, will beg a host of questions, some of which will be answered in episode #15, some of which won’t…at least not right away …

Mallozzi identified six questions that SGA fans have been asking about the current whereabouts of the city-ship Atlantis, where the Stargate is on Earth, and what has everyone been doing during the time since “Enemy at the Gate”, which took place nearly a year ago in the Stargate timeline. To close out the entry, he indicated that the identity of the two characters/actors won’t be revealed until Syfy makes “the grand announcement when the time comes. Watch for it!”

Episode #15 is currently “Seizure”, written by one of the newer writers/producers on staff, Remi Aubuchon. Visit the episode’s guide in the Stargate Wiki for further updates.

Which two SGA characters do you think will be making crossover appearances on SGU and why?