64 of the 113 Pokemon are Gen 5 mon, so that means over half of all mon not in Gen 7 sets are Gen 5. This is why we need a dedicated Gen 5 set or at least have the remaining sets this gen with 10+ Gen 5 Pokémon in them each. GG End could have the Axew line, because it's Dragon related. Sky Legends seems to be based on Flying Pokémon, so that could mean we see Tornadus and Thundurus due to them being Flying Type Legendaries. I'd also like to see Pidove, Ducklett and Ruflett lines make it to this set. Remix Bout may be a Starter related set, which means we could see the Gen 5 Starters finally appearing in this Gen. Miracle Twin may also feature Pokémon in doubles, so like Throh and Sawk, the former of which we haven't seen yet. I'm guessing we also have the mini set after Remix Bout and the final set in September, though that one's probably only going to have reprints.