Commander 2019 hits the shelves on 23 August 2019 and brings with it three 3-color decks and one 2-color deck, all of which are based around a classic Magic mechanic. These aforementioned decks are Sultai Morph, Jeskai Flashback, Naya Populate, and Rakdos Madness. Populate and Morph are already popular mechanics, though there hasn't been a good Naya commander or Sultai commander for their respective Commander archetypes. Madness and Flashback on the other hand aren't really "decks" in Commander in a traditional sense, so these will offer a good jumping off point for people interested in the two mechanics.
Each box, as usual, comes with an Oversized Commander card and one 100-card Commander deck with each of the three included commanders in foil. It also comes with 10 double-faced tokens, so that you have access to all the tokens of your deck.
Now without further ado, let's dive into the commanders themselves and how they might look in the greater Commander landscape.
The headlining commanders of the Commander products are always the biggest draw every year, as they tend to be specifically designed to work well in the format – as opposed to Standard legends, which need to also work in the greater Magic landscape. For 2019, Wizards of the Coast decided to be a little more conventional than usual, being closer to the legends you'd expect in another set, rather than interacting specifically with the Commander format in some way.
The Sultai commander, Kadena, Slinking Sorcerer, reduces the cost of the first face-down creature spell you play by 3, giving you a free Morph creature each turn, while also drawing you a card every time you play a face-down creature. Free spells and card draws are very strong in Commander and this commander is sure to be a favorite for those wanting to optimize their Morph builds. Considering the competition for Morph is Animar, it's good that this card is powerful.
The Rakdos deck features Anje Falkenrath, a haste-y three-mana vampire that lets you tap to discard a card, then draw a card. The trick to her, however, is that she untaps whenever you discard a Madness card, turning her into a nice filtering engine that also enables your Madness triggers. Anje is more or less generically strong, being a three-mana haste creature that lets you tap and rummage.
Sevinne, the Chronoclasm is the primary representative for the Jeskai deck. He is a five-mana 2/2, which is a fairly weak stat line. However, all damage dealt to him is prevented and he doubles up during the first instant or sorcery that you play from the graveyard at each turn. The fact that he copies instants means you can use him on each players' turn. There are sure to be fun ways to really break the spell-doubling effect he enables.
Finally, we have Ghired, Conclave Exile. He is a five-mana 2/5 that makes a 4/4 Rhino when he enters the battlefield. That's boring though, especially for Naya players. The real trick to him is that he Populates whenever he attacks. And the token he creates enters tapped and attacking. Think of him as a more flexible Geist of Saint Traft, and he'll end up being quite popular in Rhino and Populate decks alike.
These are but the commanders of these decks, but they should already give you an idea on whether you're interested in exploring these mechanics or it's a pass this year. If you are, however, these decks are a great starting point!