It's from the 2018 Annual I think. They are confronted with a huge amount of ghosts and Egon calls in all the other dimension's ghostbusters for the first time for back up.

"Is that a She-Egon? I don't now how to feel about this." RGB-Peter when spotting Holtzmann.

Preview of Crossing Over #7:

https://issuu.com/idwpublishing/docs/gh ... over_07-pr

I've been getting the A-covers, but the B-covers on this series have been very tempting. A gaggle of Egons on 5B, and a mock Kylie action figure in full 1986 style on 7B.

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Holy random release date, Batman!

Keeping up with the dates that these comics are out is like a job of its own!
One issue left, and I've no idea what's gonna happen next. 
I couldn't agree more. The Kylie action figure cover is probably one of the best of all of them. 

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"Welcome to Britain. We have prevailing south-westerly winds and 52% of our days are overcast so as a nation we are infused with a subtle melancholy -- leading to eccentricity, binge drinking and casual violence." - Bill Bailey.

The Kylie cover was quite funny.

And I knew this was the way #7 would go, by instinct. I just wish Ron would've died though. Then again, Tiamat sending him back to Prime dimension makes sense, cos no pack and all injuries means he's no fun as a chaotic being.

Don't talk about RGB Janine like that, Janine! You know you love being out in the field too! At least a little....

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Keeping hope alive, even at the bleakest moment.