Dominaria is the plane that will probably get the second set of land expeditions. Lots of good potential cards that are plane specific.
I would actually figure Dominaria is the plane that they can do a purely creative theme and just have "stuff from around here." On top of lands there's a bunch of artifacts and creatures that are Dominarian exclusively and could fit well in a set like that.
But yes, it will almost unquestionably have lands. Urborg, Tomb of Yawgmoth expedition *drool*
I can agree with most of what he's saying, but my big complaint stems from how Lax Wizards is in moderating the Format. Like, I know they can't micromanage it, but "the rules" of Modern are so loosely enforced by Wizards. They say that they don't want Fast Mana in the format(But leave SSG and Mox Opal in). They say they don't want Modern decks to be too consistent in how they function, but Kamikazoo is effectively a 48 card deck because 12 cards cycle for 0 mana. Wizards says "Modern is a Turn 4 Format" but never help to keep that in check. Technically, Twin was keeping the Format focused on Turn 4, even if that was by virtue of a Two card "Oops, I win" combo.
I think this is partially a result of how the format's purpose has bounced around (like, until they pulled it from the Pro Tour again they were somewhat artificially constrained in how they modified the banlist) and partially a question of trying to maintain that balance. Like, the SSG exception is certainly weird, but at the same time if it isn't actually producing an imbalance in practice in the current metagame it makes a certain amount of sense to leave it alone even if it breaks the rules.
That's true, but MaRo was asked this just a few days ago and said Ajani's basically in GW as they have no other "defining" walker in that 2 colour pair. Sarkhan as Temur was super weird though, I'll give you that.
Oh yeah, I mean, I wouldn't expect to see a mono-white Ajani again soon, I just wanted to note that they do take PWs outside their "official" combos and so a three-color Ajani wouldn't be entirely off the table if there was a set-relevant reason for it. (But yes, most likely he'll get another GW card next.)
I was envisioning just a mechanical reboot, not a complete reboot.
The issue is that the creative on Kamigawa is actually the biggest problem with the set. The actual spirits were a big disaster for them because they're so weird, don't have a really consistent aesthetic, and are very tough to tell apart. They also used up so much of the creature creative space in the block that there's almost no non-humanoid, non-spirit creature type options, and only one of the five iconics exists in the setting. The mortal side of Kamigawa is firmly in the "people from under the green sun" era of setting design so it's just five fairly stereotypical monocolor races without a lot of subtlety or crossover.
Like, you could fix the problems with those things, but then you wind up with something that looks pretty different in major ways to how we last saw Kamigawa and it's still more work to get there than to build a new setting.