The guard doors open on the left and right, revealing the figure of the Evangelion.
Hyuga (OFF - Announcement):“Prepare to launch!”
Man A:“Release the first lock bolt!”
Reichu: Because Renewal has the BGM EVA-01 start earlier, it no longer starts up in synch with the guard doors opening. That had a bit more dramatic effect, but at least in Renewal the song plays considerably longer, which is nice, since this is the only time in the series that it's used.
Sharp-kun: Given that the Eva moves backwards, why remove the cage in front? ;) Most likely it's just meant to represent something like “uncaging the beast”.
Reichu: Well, think about it… The umbilical bridge and restraining plates need to go somewhere.
Sephizim: The shadows and the angle make Unit-01 look pretty weird here...
