Perhaps it's a bit much Pandora to have a Pandora EGS:NP storyline while the start of Sister 3 is happening, but this is where my idea box (aka my brain) took me, and there are some things I want to show Pandora doing.
Granted, that's not the only reason I want to do this storyline, but I can say that without it being spoilers. I mean, the canon cannon is right there. It's obvious there's SOMETHING I want to establish as canon.
A human-ish Pandora form is visible in the cloud because, otherwise, I felt some people would just be like "what's with that monster cloud". Also, I wanted to draw it. Granted, people might still be like "what's with that monster cloud", but they'll then get the "oh" moment with the next comic (assuming they haven't read this, in which case, yes, that's Pandora and not just some monster cloud).