Response to an unknown guest
I think Saw Gerra would try to recruit them, but I don't think their interests will align. So it would be hard for them to work together. I could see RWBY feeling bad for him and Ironwood trying to arrest him for his rebellious actions.
Yeah, the 501st could definitely do that. It may take them a while to get adjusted to the alien life forms, but Atlas and Mantle will survive. The ships of the Galactic Republic could handle evacuations much better. I don't think they would blame Winter (good soldiers follow orders), but I could see Harriet's actions out of line with the 501st.
Response to ARC-5597
Yeah, I saw it. I'm pretty sure I saw Crosshair at one point, but I could be wrong. The idea of Omega is pretty cool, it kind of lines up with The Mandalorian and The Way of the Maiden. All I can say is that I'm super excited to see the show.
Response to Wolf
That's an interesting idea. They could try to make him a slave, but he might fight back. They could give him a job, but Cinder would be a slave. I don't know if she could help him remember since she knows nothing about him, but they could definitely be friends and escape. I think Gregor would stay in touch with Cinder, maybe even after the Clone Wars ends.