I doubt we will go shard hopping, but I wouldn't be surprised if connections are made to the other existing shards. Because we are now aware that preventing calamities saves lives in multiple dimensions, catastrophic damage to basically any shard cannot be allowed. The tide of keeping Zodiark in chains is still heavily in favor of his servants. There are so few shards left. Everything we've done thus far has basically prevented further loss of Hydaelyn's shards and the rejoining.