I think we'll see some Exo members(Xm and Cy are my guess, because I don't know if Sh has been attending concerts since enlistment) in the Encore audience. It's his first relatively big Korean fanmeet where it wouldn't be like celebrities were taking fan seats, so some idols would be there.
sehun was at chanyeol's concert with kyungsoo
I didn't even think of it ngl but well he isss kind of treating it like a concert what with the big venue, live band, etc etc so ig that could happen?
- let's not forget he did have woobin and kwangsoo on stage with him as well, although that was a surprise (which!!! I'm still not over it it was so sweet of them)
Woobin and kwangsoo are more like surprise guest who surprised him as well. Not sure about CY considering he’s in Japan(?) but Idk if kyungsoo is the type to invite celebrities considering it is a fancon but as you said he is treating it like a concert so who knows. I’ve seen some actors and idols have guests in their fanmeetings but they were invited by the artists themselves