Scenes of Crime will be on their way very shortly.

Hi. I'm Lio, a South Korean eager to learn English.

I thought I've got a pretty good understanding of the meaning of 'be on one's way" until I ran into this sentence.

[ Scenes of Crime will be on their way very shortly. ]

It would be crystal-clear what it means for native speakers, I 'm sure.
But the way I see it, it seemed to have two possible meanings.

1. Scenes of Crime have not started yet. But they will get started soon.
2. Scenes of Crime have started. But they haven't arrived yet. They will arrive soon.

Well, those two are, I suppose, obviously different,
and I'd like to know what native speakers would choose as a better one closer to its original intention.

Thank you.
Your comment will be appreciated.