Predicted top four (ordered): Terry Funk, Bryan Danielson, Genichiro Tenryu, Kenta Kobashi
Those are the four guys I've seen getting more universal love online on recent GWE discussions, by far. Other predicted top ten locks might be Flair, Misawa, Hansen and, you know what, Tanahashi as well. His retirement seems to be this year's case of recency bias much like Bryan's first retirement was for 2016 and Eddie Guerrero's passing was for 2006. If I were to predict the whole top ten, I would say something like this:
1. Funk
2. Bryan
3. Tenryu
4. Kobashi
5. Flair
6. Misawa
7. Hansen
8. Liger
9. Kawada
10. Tanahashi
Bret Hart has regained a lot of fans these recent years with guys like Punk or FTR pridefully showing his influence over their bodies of work, so maybe he sneaks in.
Biggest jumps will be most of the big joshi names and some of 10s New Japan and huge recent indie stars (WALTER and Ospreay). Inoki, too; him not being in 2016's list seems like the biggest mistake to colectively correct. Biggest drops I would say will be some (definitely not all) of the US territory guys that made pretty well last time.
I don't believe most of the big WWE names will heavily drop, due to the nature of most of the lists I've seen on Twitter from new people (hell, I'm one of those, I still have in high regard some names like Taker, Michaels or Angle).
I would also bet on luchadores somewhat improving their last results, but not by a lot.