What is the story of "Masters of the Universe: Revolution"?
The official announcement for the series included the following story log line:
“Masters of the Universe: Revolution is an all-new story that brings the focus to He-Man vs. Skeletor like you’ve never seen them before. It’s technology versus magic as He-Man and the heroic warriors face the forces of Skeletor and a deadly threat to the Planet.”
Given the final scene of "Masters of the Universe: Revelation" revealed that Motherboard, the deity that former warriors of Skeletor: Tri-Klops, Trap Jaw, and Whiplash, had been worshipping, was in fact an android of "The Evil Horde", the faction of evil warriors led by iconic Masters of the Universe villain, Hordak.
There is a very high chance that Hordak and his Evil Horde represent both the "technology", and the "deadly threat to the planet" mentioned in the initial log line for the series. Additionally, there is a good chance that, at least initially, Skeletor will be part of Hordak's army on Eternia. As the final scene of Revelation wherein Motherboard was revealed as an Evil Horde android, also teased Skeletor being converted into a cyborg like his former warriors due to Motherboard infecting him with their nanites.
On the "heroic warriors" side, "Revelation" ended with Teela accepting and embracing her destiny as the new Sorceress of Castle Grayskull, and knowing and accepting Adam both as himself and as He-Man, before seemingly showing Adam and Teela, albeit subtly, acknowledging their true feelings for one another.
In addition, the finale saw Andra installed as the new Man at Arms of the Royal Palace of Eternos, along with King Randor and Queen Marlena being both aware of and accepting of Adam as He-Man, whereas previously, King Randor didn't realise that his son and Grayskull's Champion were one in the same.