[Update]: The Wilds of Eldraine set has now arrived with a bunch of new cards, improved duplicate protection, as well as Alchemy rotation.
If you're looking for a bit of a meta shake up, you'll be pleased to hear that the next Standard expansion, Wilds of Eldraine, will be heading over to MTG Arena on September 5th. The new set will bring with it the usual assortment of wacky cards to mess around with, as well as a Mystical Archives inspired bonus sheet filled to the brim with all sorts of classic enchantments.
Much like how it worked before, each pack will have a single common card replaced with one of the aforementioned 'Enchanting Tale' cards. As such, collecting a good chunk of them should be fairly easy, at least as far as the rares are concerned anyway. A good thing too, because this time around the bonus sheet is absolutely stacked with excellent cards!
It's also important to mention that the Enchanting Tale bonus sheet won't be changing the format legality of any of the included cards. In other words, they won't be Standard legal unless reprinted in a Standard set, though the non-banned ones will be playable in either Explorer, Historic or Historic Brawl.
You can check out the full list of Enchanting Tale cards over at Scryfall as the official card gallery is unfortunately a bit of a mess right now.
As for the main set, it should come as little surprise to hear that Wilds of Eldraine will once again have a heavy focus on cards with Adventure abilities and Food synergies. The one big new addition are Role Tokens which are auras that are created by various cards and put on creatures in order to usually give them +1/+1 and some minor ability. Besides being a decently powerful effect on their own, the Role Tokens can also be sacrificed to various cards in order to power them up, so I have a feeling they'll be a pretty big player in the Wilds of Eldraine limited formats.
What these Role Tokens look like as a part of an actual card, as well as what each of the color combinations is going for, that you can check out over at the Wilds of Eldraine card gallery.
Have fun brewing up new deck ideas, and I'll make sure to let you know once Wilds of Eldraine arrives onto MTG Arena this September 5th.