If you see news blips that the 200th episode of 'Stargate SG-1' was going to tip its hat to 'Firefly' and "Serenity", don't let it trip you into arrhythmia. It's not going to be like the inside joke homage seen in a quick cameo on 'Battlestar Galactica'; there will be no crossover possibility.
Instead, it's the situation of the plotline that seems to echo the Real World history of Joss Whedon's sci-fi series, which was untimely ripped from the schedule, only to be reborn as a theatrical released sequel.
As such, it provides more fodder for the entertainment folder of Toobworld trivia:
From SCI Fi Wire:
The 200th episode will bring back the character of Martin Lloyd (Willy Garson) and his fictional TV show 'Wormhole X-treme', which was the subject of the 100th episode, "Wormhole X-treme," and is a parody of SG-1 itself.
This time around, the SG-1 team helps Lloyd turn 'Wormhole X-treme' into a movie. "Even though the series was canceled after three episodes, it did well on DVD."
Thus, the 'Firefly'/"Serenity" reference.