The only one of the games you listed that I think of as having been even somewhat “new” a year ago is hi-dugi, and even that I’d known prior
But, with that said, “Archie’s game,” aka “Archie,” aka “triple draw hi/lo split” is relatively newer than the games you listed, so you might want to check out the rules for that game prior to heading to the Series if you’re not familiar. It’s been quite popular in the Vegas cash games for a couple of years now. It’s played A-5 for lo and with a qualifier for hi, and it’s in the mix in the WSOP Dealer’s Choice events. There are a couple of YouTube vid’s you can watch to learn some of the strategy basics.
The 5-card PLO (aka, “Big-O”) variants sometimes make it into the mix, and they’re also played full ring straight (that is, not in mix rotation but just on their own).
Some places are spreading “Crazy Stud” games—hi and lo variants that just add the pineapple component to the stud games.
Someone was telling me something about some other newer variants that have made their way into the low stakes cash mix at Aria, but I honestly can’t recall the particulars. Some of the low stakes mix games include all kinds of crazy mess, like simultaneous-NLHE/Omaha, where each player is dealt one HE hand and one Omaha hand and the best hands chop from one board. Double-board Omaha limit hi has also been played a couple of times that I’m aware of, and last year (or the year before?) someone posted that one of the meet-up mix games was playing some kind of “pass-the trash” variant, but I don’t remember what that was all about... Someone on here will probably know all the more nutty and obscure variants they’re messing around with.
But basically, most people play all the same games, plus Archie makes into some mixes, too.
GL!