There's some technicalities to what they've filed, it's not just any summoning.
Basically when you summon and it ends up where an enemy is it launches a player controlled battle, and when it doesn't it will wander around with you and autobattle enemies. Pretty much how you can let Pokemon out in the Legends games. It's specifically that specific combination/configuration of functionality they patented, not just any summoning.
But it's still absolute bullshit that should have been denied by any employee of the patent offive with two brain cells to rub together. There's other existing work and generally, historically, the patent office hasn't allowed patenting of such generic game mechanics.
