Fanboys Anonymous

In Captain America: The First Avenger, we were introduced to the Tesseract. Eventually, as the series progressed, this was fleshed out more to be clarified as the Space Stone that made up the Infinity Gauntlet.

At least as far as Avengers: Endgame is concerned, the Marvel Cinematic Universe no longer truly has the Tesseract in play after Thanos "used the stones to destroy the stones" and reduced them all to atoms.

With that in mind, as well as how the Tesseract was utilized as the Space Stone, that means we've yet to truly get the Cosmic Cube in all its glory in the MCU. It's clear Marvel decided to somewhat merge the concepts and simplify things while representing the Cosmic Cube in some fashion. Red Skull and Thanos went after the Tesseract, just as they often do in the comics with the Cosmic Cube. It's just a lot simpler to tell people that it's one of many and move that plot thread along, rather than give them an entirely different MacGuffin and then sidestep to the Infinity Stones and treat them like a bigger deal.

But not having had the Cosmic Cube in the MCU means we're missing out on a chance to do some other stories. The Space Stone doesn't grant wishes like the Cosmic Cube does. Plus, there's no tie-in with the Beyonders or anything else that can be tapped into.

So what should happen to bring the Cosmic Cube into the MCU at some point in the series' future? I think there are a few things that have to be addressed: its creation, how to keep it a fresh idea, who wields it, which characters interact with it and so on.

The MCU cannot just randomly toss out the next all-powerful item and move on as if the Infinity Stones are yesterday's news without feeling like it's rehashing a similar formula. The Cosmic Cube has to come about through different means and not seem like an ancient thing the universe is built upon.

Luckily, there's a precedent in the comics that the Cosmic Cube can be artificially created and by many different civilizations. That opens tons of doors and options for how this can come about.

Here are just a few potential ways I think they could bring about the creation of a Cosmic Cube, if not multiple by picking a variety of these:

• The Beyonders - Even if it isn't spoken of at first, there could be an eventual reveal that the energies contained in these are coming from the dimension the Beyonders dwell. That could bring them in as one of the biggest threats to the universe.
• A.I.M. and M.O.D.O.K. - Let's assume the benefactor from Ant-Man 3 plays into all this. They can say that the Cosmic Cube has something to do with Pym Particles and the Quantum Realm. Advanced Idea Mechanics has been associated with the Cosmic Cube in the past, so that's a good tie-in.
  
• S.H.I.E.L.D. - Project Pegasus was studying the Tesseract. Maybe they tried to create their own version of it and that's why this is a cube as well?
• Skrulls and Kree - These two societies are old enough that they could have come across any of the necessary materials to create something like this. Skrulls have been involved with the Cosmic Cube in the comics, too, and with the amount of focus on the Tesseract from the MCU in Captain Marvel, there are more than enough connections.
  
• High Evolutionary - Between everything going on with Adam Warlock and the High Evolutionary, I would be easily sold on wishes created from this kind of device being how The Sovereign can create their race and such.
  
• Fantastic Four - The Negative Zone could be part of this (but I doubt it) and they could even tie this into being related to Franklin Richards. What if the Cosmic Cube has his reality warping powers, in a sense, wherein it works into his future self and Kang the Conqueror and all those story elements woven together? The Cosmic Cube could be one of the main things Reed Richards studies over the course of several films.
  
• Doctor Strange - Since this is wish based, you can easily sell me on the idea that it ties into the Multiverse of Madness as another magical trinket that Doctor Strange studies.
  

Of course, all of this depends on what Marvel has in store for the next phases of the MCU. For all we know, the goal is to focus on Galactus as the sole cosmic force out there and something like this would take too much attention away from him.

Ideally, I'd love to see The Beyonder brought in, Battle World and Secret Wars to take place, some older characters like Steve Rogers and Tony Stark come into the fold with cameos based on wishes and for this idea to be fully realized, rather than just forgotten about as merged with the Space Stone. But what do you have in mind? What would you like to see the MCU do with the Cosmic Cube?