I said it. The Inhumans are coming, to some extent, to [Agents of S.H.I.E.L.D.](series:722469) That means YOUR television screen. Before I get to all of that, however, a quick review of the episode. Like all of the episodes in Season 2, Ye Who Enter Here was fast-paced and action-packed. All though it does feel like this episode was setting up next Tuesday's fall finale more than anything, which isn't really a bad thing. Ye Who Enter Here brought several new plot lines to be tied up. Some of them are too much to put in here without spoiling the episode, some of them are slight like Bobbi's conversation with Mack about...something that Bobbi doesn't want Hunter (or anybody watching the show) to know. Everything that they set up in this episode almost promises an interesting fall finale, and good season to boot once the show begins again next year.
To answer the question under the picture, probably not. I highly doubt that the likes of Black Bolt and Medusa will show up in the show. I do, however, think that it's more than likely that the S.H.I.E.L.D. team will find one of the following:
a.) Remnants, relics, or weapons from [The Inhumans](movie:910490) (by remnants I pretty much mean skeletons or something like more writing, another map, etc.)
b.) Remnants, relics, or weapons from the Kree (or possibly information on the Inhumans)
c.) The Terrigen Mist, Terrigen Crystals, or a reference to either of them.
Out of all these options, I find one of the weapons the most likely because there have been several mentions of a weapon that can wipe out most of humanity, leaving the worthy to inherit the earth (the worthy possibly being descendents of the Inhumans somehow?), in a temple in the ancient city. The least likely option is the Terrigen Mist and Crystals, all though that would be pretty cool. The Doctor did say that whatever the weapon in the temple was, it would do something "cooler" than the Diviner. I would say that a mist with the ability to mutate a portion (albeit a small portion) of the population is much cooler than a chunk of metal that turns you to stone.
As for why I think that the Inhumans are coming, there have been references to the Kree since Season 1 when Coulson discovered the blue alien in T.A.H.I.T.I. There was also the writing the Garret did, and Coulson has been doing since Season 2 began. This writing has been linked closely to the Inhumans on a few occasions, mostly through the newer comics.
Also, in the episode The Things We Bury, Bakshi told Bobbi an ancient story of "blue angels that fell from the heavens." In Ye Who Enter Here, Raina told Skye the same thing, with an added sentence: "the ancients called them the Kree." Blue 'angels' called Kree appearing in ancient times fits perfectly with the origin story of the Inhuman race.
Where would the Inhumans fit into the MCU right now?
After all, the Inhuman movie doesn't come out until 2018. The answer, in my opinion, is simple: Quicksilver and Scarlett Witch.
There has been a pretty popular (and very plausible) fan theory going around the web that Quicksilver and Scarlet Witch will both be Inhumans because Marvel can't even use the word 'mutants' in their movies with Fox suing their pants off. I took this theory a step further with the creation of these two characters. After all, all we know about the twins' origin is that Hydra did something to them with the stone in Loki's staff, which most believe to be another one of the Infinity Stones. I think that maybe, just maybe, the stone is both an Infinity Stone and a Terrigen Crystal. Extremely unlikely? Yes. Completely impossible? No.
This also fits with another post I read on here written by Kit Simpson Browne about the likely hood of Marvel starting their Civil War in Agents of S.H.I.E.L.D. (look below for a link; I can't figure out how to put it in the text.) by introducing Speedball to the team. You'll have to read Kit's article to learn how he plays in, but I think it would be both cool and a great season finale for somebody with superpowers to be introduced to the team who isn't trying to kill them. Also, it would make sense that Marvel would try and set their movies up in the world of S.H.I.E.L.D. In fact, I'd really like to see that. We've seen how Thor: The Dark World and Captain America: The Winter Soldier have impacted the show; I'd like to see how the show is going to start impacted the movies (I've got a theory on this that I'm going to be writing into another post, so stay tuned).