There's a mobile game in Japan called Senran no Samurai Kingdom. By the looks of it, it's a gacha game with tons of guest fighters. Take a look at who I saw!
It's not just SenKag that's got representation either; they also feature a franchise starring a certain someone who's been making the rounds in Smash lately.
I know for a fact that this means nothing, but it's still a really cool little bit that I felt could be shared nice and easy. But if you'd like, you could take a bit of comfort in knowing that a franchise in Smash has some ties to SK (whether or not that actually matters is entirely up to you).