Correct. All of the Gen 4 Pokemon were in the Hisui Dex, was what missing from LA were a handful of 1st, 2nd, and 3rd gen Pokemon brought back for the Sinnoh Dex in DPPt, and Feebas/Milotic fall into that latter category (IIRC there were about 8, I also distinctly remember the Maril, Swablu, and Meditite lines being excluded). I do agree that similarly, all of the 6th gen Pokemon will be in the game (Lumiose Dex?) but not all 454 of the Kalos Dex Pokemon. We've seen a pretty clear pattern post-Dexit where they don't really want to do more than 400ish Pokemon and even then only for new gen games. For this game I wouldn't be surprised if they cut it down to 250-300ish mainly consisting of 6th gen Pokemon, Pokemon that have Megas (maybe with a few new Megas introduced), and a few new cross gen evos/convergents/variants. The entire Kalos Dex with some new additions just seems like it's going to be too much for them to handle, so my guess is they're probably going to cut a large swath of the 1st-5th gen Pokemon they brought back for the Kalos Dex.