More than likely, people will play with four different types of squads.
1) Existing meta - Gencon JM will tell the tale of the LotF/TFU era meta. The results will be reported, squads will be listed, and strategies will be well known. So people will copy. Type 1 will be squads that we already know and love/hate. And example of this will be Han GH/Mara Jedi/MTB. Usually, 1-2 players with skill running a last set meta squad will be at or near the top of a tournament this quick after release. Hence for a top 8 I would expect to see 2-3 squads with no changes from Gencon lists.
2) Minor Tweaks - Some people will take one piece from Kotor and substitute out something from and existing squad. It won't change the squad a whole lot, but perhaps offer a slightly different option. These squads also do well as they really are nothing new and people are really just changing up a common squad type they are already completely familiar with. And example would be running:
--Han Cannon Kotor--
46 Han Solo, Scoundrel
23 Jolee Bindo
20 Princess Leia
18 Lando Calrissian, Dashing Scoundrel
17 Bothan Noble
8 Obi-Wan Kenobi, Jedi Spirit
8 R2-D2
9 Ugnaught Demolitionist x3
(149pts. 10 activations)
Basically subbing in Jolee as the melee interference who can add Valor to Han and Lando, and a Bothan to power Lando for double Opps, or Han for an extra twin here and there. Another example would be using Wedge in the NRNothing really different than before, but some other options than previous versions. I would expect to see most of the top squads falling into this category, so out of 8, probably 4-5 of them.
3) New squads/factions - This is the place you are likely to see the guys who just like to try everything that is new every set. You will see Mandalore Mandos, OR squads, Wedge led melee squads in the NR, some weird shooter/melee mix squads such as Sion and Boba, or Jolee pumping Sith with Valor, etc. Odds are these guys/girls won't place highly, not because of squad strength/weaknesses, but because they will make mistakes learning the new pieces and won't use them to their highest potencial yet. You will likely see one of these in the top 8 at most.
4) Finally, the post-meta squads. Someone will figure out what the expected meta squads are, and will guess correctly. And whether their choice is a map or squad or likely both, they will have everyone else beat and people will copy their squad for years to come because one guy/girl won one tournament once somewhere with it and they heard it was good. Since this should be a decent enough sized tournament (I predict 20-30 people) odds are its a good squad, but very likely an odd one. For example the squad that won Origens of Mara/Han GH/Shado/Ugos. This may not be the tourney winner, but someone in the top 8 will have a squad we wouldn't normally expect to see ranked at that position, or one that carefully counters the others, even if its not necessarily the best of the best at the end of the day (although it could very well be). The point is, its a post-meta squad - its strength is taking on the PAX meta. For example I give you a melee build. Let's say for example lots of people go with NR Wedge. Someone expects that, and decides to run melee beats who don't care about mobile attack or evade. They successfully win the key inits in the 2-3 close games they play, and their beats take out the shooters.
Hope that about covers it