What if Cho’Gath was summoned by Malzahar?
I think it would be a great payoff for Malzahar’s efforts if he actually summoned Cho’Gath. Let’s say he infiltrates a city along the northern coast of Shurima, maybe even one of the cities occupied by Noxus. There, his cult spreads and work on something similar to what happened in Icathia. This time however, Kassadin is there to try and stop it (maybe even Kai’Sa could show up). They manage to successfully open a void rift and Cho’Gath comes stomping out like godzilla. After this, Kassadin closes the rift, Malzahar retreats and now Cho’Gath is unleashed on the world.
From here, anything could happen. Maybe they drive him into the northern sea and he heads to Valoran. There he could head to Demacia, where he could fight with Galio in a clash of the titans, or he could be a common enemy to help Demacia reconnect with mages. He could head to Noxus, tearing apart the empire they’ve worked so hard for, maybe they try to trap him and use him as a weapon. Maybe he doesn’t cross the sea, but heads to Kumungu and Piltover. He could even go to Targon, although there isn’t much for him to eat there.
It feels like there are stakes when bad guys win. I think pulling Cho’Gath into this world would really show that Malzahar means business and needs to be stopped.
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I'd love a Galio + Cho fight though I don't trust Riot's current lore writers to do it right or treat either one consistently,but I don't know how far he'd get before
etc show up.