Very interesting, we're also getting close to BDSP's release in November so the chances of these being a DP-centric set seems to be on the mark.
VSTAR kind of reminds me of the old Pokemon Star mechanics from EX Team Rocket Returns-EX Power Keepers (and POP Series 5), perhaps it's something similar to that? I can see the Pokemon V and V Union mechanic surviving a possible switch like EXs did (but not VMAXes since they're region-specific due to being tied to the games' Dynamax/Gigantomax mechanic).
VMAX Climax gives off the same air as VMAX Rising and feels like it's a "finale" set so I have feeling it might be another celebratory reprint set like GX Ultra Shiny and TAG All Stars were.
Venusaur: check.
Blastoise: check.
Charizard: check.
Butterfree: check.
Pikachu: check (plus two extras).
Meowth: check.
Machamp: nope!
Gengar: comin'.
Kingler: nope!
Lapras: check.
Eevee: check.
Snorlax: check.
Garbodor: Evolving Skies.
Melmetal: nope!
Rillaboom: comin'.
Cinderace: comin'.
Inteleon: comin'.
Corviknight: check.
Orbeetle: check.
Drednaw: check.
Coalossal: check.
Flapple: check.
Appletun: nope! (but identical to Flapple, sort of)
Sandaconda: check.
Toxtricity: check.
Centiskorch: check.
Hatterene: nope!
Grimmsnarl: check.
Alcreamie: check.
Copperajah: check.
Duraludon: Evolving Skies.
Eternatus: check.
Urishfu: check.
The other Urishfu: check.
Rillaboom, Cinderace, Inteleon, and Gengar are coming (are any of them going to be in Evolving Skies? I'm not sure). Machamp, Kingler, Melmetal, Appletun, and Hatterene are the only VMAXs we haven't seen revealed in Japan yet. Now, we know that there will be 15 VMAXs in Evolving Skies, and there are 8 in Eevee Heroes and 3 each in Sky Stream and Towering Perfection. That totals to 14, which means that we will get at least one of these VMAXs. 4-1+5=8
(obviously), so we have 8 more VMAXs to get through. Now, if the last set of 2021 is a combination of Fusion Arts and VMAX Climax, that means we need to have 8 gigantamax VMAXs in a single set, unless the two Pikachu VMAXs aren't an actual part of the Celebrations main set (which they almost certainly are), since we know that there are two VMAXs in that set. Now, can we reasonably expect a set to have EIGHT gigantamax VMAXs, when the most we have ever seen was 5 in Darkness Ablaze? Perhaps. In any case, eight VMAXs is what it will take to clear out the gigantamax collection in one fell swoop.