Upcoming Event Schedule?

Merlin is coming in December of this year. The event after the Christmas rerun should be the new Christmas event where we get Jeanne d'arc alter lily lancer as welfare. The summoning campaign will have Ishtar on rate up

After that we get an independent Altera summoning campaign

On JP, this was followed by the release of Babylon with Gilgamesh Castor and Enkidu Lancer on rate up, but I'm not sure if this will happen before or after the christmas events on NA

Babylon will also have a second summoning campaign where Avenger Gorgon, Quetzalcoatl and Tiger will be on rate up.

And then finally, the Salomon summoning campaign with Merlin on rate up.

Not sure if this will happen in NA, but If you managed to finish Babylon before Salomon was released in JP, you got an extra 30 sq as a reward.

However, keep in mind this is based off of what happened on JP. DW might change things between now and Salomon

Here’s a link to a site that shows all the upcoming summoning events. https://grandorder.wiki/Upcoming_Summoning_Campaigns_(for_EN_reference)
We don’t always follow this exactly but it’s mostly accurate.

If it we're me trying to match up with the JP schedule, I would release Babylonia next with 1 week still in November, then release the Christmas event right after on the 2nd week of December, then finish out the year overlapping Solomon and New year's, including Merlin summons.

That's my guess. As far as Merlin is concerned he's very overpowered, can make any team tier 1, but if you're like me and like him for his character, then definitely roll.