User blog comment:Chinkycandie/Upcoming Crossover/@comment-26618197-20180903103957

I want this to be on Earth 38, we've been to Earth 1 a lot but no one besides Barry and Cisco have been to Earth 38.

John should meet J'onn, I mean everyone should meet J'onn but John especially so we can finally get jokes about the two Johns.

Cisco and Brainy should meet, Brainy because I want to see his reaction to the other Earth and Cisco because he knows how to deal with smart people and apparently Brainy's going to clash with people so he can kind of show how to handle Brainy's...brain.

Iris should meet Lois, she's going to one day write for her own paper so Iris should get some tips.

Brainy and Gideon interaction, c'mon Brainy's an AI based alien and Gideon is an AI. They could have some funny and/or heartfelt interactions.

Winn should meet Cisco and Felicity, mostly Cisco because it's a match made in heaven.

And finally one more hint to a world merge happening in the future, it can be something small like a little earthquake or maybe at the very end focus is put on an old photo and for just a few seconds someone from the other Earth appears in the photo. Not only have there been more than enough jumps to weaken the barrier but, if frequencies are determined by how similar one Earth is to the main Earth, Earth 38 probably has an almost identical frequency to Earth 1.