Agents Of S.H.I.E.L.D.: What Was Coulson Writing On The Wall?

Last night's season finale of Agents of S.H.I.E.L.D. seemingly ended Coulson's battle with the Clairvoyant, John Garrett, but still left us wondering about where Coulson's head is at. At the end of the episode, Coulson gets out of bed and goes into a storage room at the Playground. There, he uses a knife to scrawl out a huge, intricate design pattern on the wall. It's not the first time in the episode that we see such a design. Garrett, after being subjected to GH 325, begins acting strange. At one point he removes a door on the Bus and begins carving a similar pattern into its window. So what is that pattern? We can't say for sure, but we can look at the few clues we have and see what possible theories emerge. Coulson and Garrett are the only ones who have created this pattern so far. The one thing they have in common, besides sharing an employer, is their exposure to GH 325. Skye has also been injected with this substance. The substance comes from a blue alien at Project T.A.H.I.T.I. which most fans theorize is a Kree. If we assume that the alien is Kree, it opens up a couple of different options. Could humans being dosed with Kree genes end up creating the Marvel Cinematic Universe version of Captain Marvel (or Ms. Marvel)? Garrett's enhanced perception of the universe could be a version of Captain Marvel's cosmic awareness. That's not exactly how cosmic awareness works in the comics – it's more like spider-sense on a galactic scale – but it's possible that the cinematic universe is taking some liberties. The Kree Empire is also ruled by an entity called the Supreme Intelligence. This organism possesses the ability to communicate with its subjects through a kind of telepathy. Could Garrett and Coulson be receiving some sort of transmission from the Supreme Intelligence?  Or perhaps they've absorbed the deceased Kree's order to build a new Supreme Intelligence on Earth, to colonize? There are other possibilities as well. Maybe they are drawing some sort of complex star map that points back to the Kree home world, or that is meant to lead the Kree to Earth. It will be interesting to see if any nods are made to the blue alien in Guardians of the Galaxy, since the film features Ronan the Accuser and Korath the Pursuer who are both Kree in the comics. Of course, this doesn't explain why Skye isn't getting the sudden urge to draw mysterious designs onto things. Then again, Garrett almost immediately started his drawing while Coulson had a much more delayed reaction. Maybe it has to do with the dosage or purity of the GH 325 they were injected with and Skye will eventually show the same symptom. Or perhaps, a we speculated earlier, Skye is an Inhuman with hybrid-Kree biology that cause her to react to the substance differently than Garrett and Coulson. We won't know anything for sure until the show returns for its second season, if even then. Until then, we'll just have to hope that no intergalactic wars break out in the Earth's solar system.