[Homura7]

There's something I forgot to point out and changes completely my thoughts exposed before.

Spoiler for spoiler:

If the big guy at the end and the one that passes by in front of Saten are the same person, then he's not Gido but someone else. Why you ask? Because that muscular dude used the honorary "-kun" with Saten, and I don't think Gido would do that.

But one more thing I noticed is that the big dude seemed to having woke up recently, so I think he's most likely a Simeon clone of someone else. He was wet and blew up a scientist.

Thinking about the whole thing coldly, why would Gido lend his hand to these guys.

Another important detail, also noted by Kurohane, is that Seth more than recognize the man seemed shocked about something else.