I don't know if anyone here remembers an old-school Playstation J-RPG called Xenogears. Suffice to say it's what would happen if Friedrich Nietzsche, Jacques Lacan, Sigmund Freud, and Hideaki Anno had a J-RPG as a love child.
Well, I remember this game fondly from my high school days (before I outgrew such things). And it occurs to me that some of the Rebellion developers might have played it, too.
Exhibit A: The Eradica Titan:

Exhibit B: The titular mecha from Xenogears:

Though I found the Advent Titan designs to be a bit of a departure from traditional Advent ship designs (which tended to resemble molluscs rather than terminal weapons of an organic planetary assault system powered by an enslaved being from a higher plane of existence), I nevertheless approve the shout-out, if shout-out it is, from a nostalgic perspective.
Anybody else see the resemblance?