Wait combining clans to make bigger clans makes no sense. That feature would only need to exist with the 40-cap, for the most part... It would just be Fizzer taking something away and giving it back.
I suspect he's got something bigger and more novel in mind than a new way to do clan mergers. And that mind-blowing new thing is the reason he had to 40-cap new clans in the first place. What's arc-related, clan-related, and would be a lot easier to implement (or work a lot better) with a 40-cap? An in-built Clan League comes to mind but then again, Clan League already exists and it's just about to start so it seems like a waste of time for Fizzer to work on.
Maybe clan games/clan wars built into the game? But I can't connect that with arc... or maybe arc is a red herring and we need to look at those images again. But I'm pretty sure they just came from Fizzer Google Image searching "arc" and picking the less obvious results.
@let's fight: yes, but you have to dig deep or use the suggested additional queries ("wedding" or "soccer"). They are results that Google Images likes, though, because if you reverse image search either you'll see them pop up as their first results. Sounds unremarkable, ofc, but it's informative vs. those images not turning up on reverse image search (like many images do). It means they've been indexed and are search-friendly at least.
The first 10-20 pages of results for "arc" on Images are actually all obviously referring to arcs, so I suspect Fizzer wouldn't have used just "arc" as his query if the hint he was trying to hide in the images was "arcs."
But then again this could just be a red herring that I'm too confident about. Maybe Hint #4 will just be "it's not an arc."
The first photo is one of the very first results on Images if you search "soccer arcs." The second one, though, well... typically those are called "wedding arches" not "wedding arcs" so I think the typo in the source is relevant to the hint. But also if you search "wedding arcs" Hint #2 is actually a bit lower in the results.