I was checking the history of the DLC sales for Endless Space on Steam... The last one was September 12, 2019 with the release of Awakening.

I missed that sale obviously, I had been playing the game via a friend's shared library after playing the original game. Recently, I added Endless Space 2 to my own library because I wanted to experience the expansions. Before I do get any DLC, I wanted to ask if there would be any plans to create a bundle sale on Steam so I could buy them all at once?

To be honest, buying the DLC content individually is not economically attractive.

As far as I remember, during sales you can just buy the Definitive Edition to "complete your collection," even if you already own the base game.

I cannot buy the definitive edition, it forces me pay for the base game. It also warns me that I will not not get a second copy of the base game regardless of purchasing it. Therefore, 40 usd is wasted.

There needs to be a bundle for just the DLC. This was why I was asking for information on a possible sale so I could just buy the content individually or as a bundle if a new DLC Bundle is made for us.

The "Complete your collection" option only works during sales. And there isn't a discount on the game at the moment, so it won't work right now.

There are two types of bundles on Steam Store (link):

• Complete The Set - that allows paying only for missing items;

• Must Purchase Together - that requires you to pay for all items in package.

"ENDLESS™ Space 2 Definitive Edition" is a second type of the budle (link). It won't allow you to "Complete your collection" during sale.

While there were bundles of the first type in the past (link), specifically "Endless Space® 2 Collection" (link) would allow you to pay only for all ES2 DLCs, they are now all delisted/deleted.

So your best shot is to wait for sale and purchase each DLC with discount individually.

I went to G2A and CDKeys to fill in my DLC.  Found the sites on accident.  I am only missing Awakening and all the minor factions except Sowers.