FYI Atraxa's Fall has "Destroy target artifact, battle, enchantment, or creature with flying."

True.

Which color(s) are the main one(s) for battle removal?

Red and white usually have slightly more “combat tricks”. Green also always has a Giant Growth like effect that’s good in combat.

Re: “battles aren’t evergreen”Will this always be the case? Like, once we get to fall of 2025 and we potentially start seeing battles again, will they not be evergreen? It seems incredibly strange to me that an entire card type would not be evergreen. Kindred at least has the fact that its existence was a mistake, but battles not being evergreen feels like saying that planeswalkers or artifacts won’t be in every set.

Evergreen means every set wants access to it, and battles simply don’t fit that requirement. Just because things have been a certain way doesn’t mean it always will be. I don’t expect us to design new card types very often, but there’s no obligation that they have to be evergreen if we do. Odds are, by the nature of how card types work, they won’t be.

Speaking of urban fantasy, I'd love to see Magic's take on a "masquerade" type world-- where it seems like a non-magical society on the surface, but there are hidden wizard battles going on behind the scenes.

We have an idea that’s similar on the short list.

Which unvisited plane on March of the Machine battles most caught your attention for a premier set? (As a personal opinion. I know you can't disclose about Magic's future)

There’s an “unvisited” plane we’re visiting in Tennis (with unvisited meaning it hasn’t be the main setting of a set).

Do you think there will ever be more cards that play in Battle of Wits space i.e. very large library? Its a big penalty for possibly cool effects, and digital would handle it amazingly.

I think it’s something we want to do exceedingly sparingly.I will say that average deck size in tabeltop is up almost 150% from twenty years ago. : )

I believe including both in the same product would have been a mistakeWell then you should have started with non siege battles and then made sieges later.Because the first version of a thing gets considered the default (which it really shouldn’t be in this case science it’s explicitly labeled as not being that by having a sub type but people love to not care about that for some reason)

They’re a default until they’re not. There are many things in Magic history that started one way and then evolved,March of the Machine needed Sieges, so we made Sieges. I get that we more often start with the simpler versions of things, but sometimes product needs force us to break patterns.

Is there any concern to having newly printed cards named things like Bridgeworks Battle when it’s a sorcery and not a battle, long term?

I agree we have to be more careful with the word battle, but Universes Beyond add the difficulty of that being the thing it’s called.

Can a BR card have “destroy target permanent”? I know BG and BW can do it but I’m unsure what holds back BR. Per the 2021 color pie articleCreature - B primary W secondaryEnchantment - W/G primary B secondary Artifact - R/G Primary W secondary Planeswalker - B primary G tertiaryLand - R primary B/G tertiaryBattle - unknownUsing the above BR is the only color combo that doesn’t use a tertiary ability

We like to focus effects in a small number of colors, so just because two colors can destroy any permanent doesn’t necessarily mean we want to make cards in that color combination that do so.

Adding Battles as a permanent that can be dealt damage means that very few damage spells that aren’t “any target” can interact with them, and new spells that R&D doesn’t what to hit players won’t either since they don’t want to call out “target creature, planeswalker or battle”. Would we ever see “deal damage to any non-player target” as a way to make these effects compatible without having to call out battle ms or other future damage able permanents?

That’s most likely to happen in sets with Battles. I’m not sure we’re changing the template in all sets until Battles show up at such a rate that it makes sense to change it.