it might be too early for some Zendikar Rising spoilers but the internet has a lot of ways to dig out speculations on the cards of the upcoming Magic: the Gathering set. Especially now that the people have enough time due to the Covid19 pandemic forcing them to stay at home.
The recent one is the rumored new version of the dual lands or the two-mana type producing lands. Here below is the card preview of this land, in a double-faced template.
As this card enters the battlefield choose as side means that you need to choose a color for that land to produce. It is somehow similar to the Future Shifted dual land Nimbus Maze where its mana-producing ability is based on whether you control a specific Island or Plains. How the double-face function is represented is still the question and is waiting for the official reveal if this rumor is correct.
If ever this card is true, it will be a reliable addition to the batch of dual lands in the current Standard as the previous sets will be rotating out once Zendikar Rising set is released in October.