Because Probius doesn’t have many skins I think there could be a zerg infested Probius with cracked glass in the eye with a zerg tentacle thing coming out.
And there could also be a lunar festival Chinese lantern Probius which could have the turrets shoot out fireworks and have the warp rifts explode like a firework.
There could also be a eye of the legion skin which would make the warp rifts and pylons green and have the turret be a legion tower.
For Halloween there could be a more severed eye version of Probius with eyes for rifts and eye towers because they are already round.