Newly released developer documentation from Intel reveals details about Tremont, a new Atom core that will replace the 14nm Goldmont Plus. This chip will be used in future Atom, Celeron, and Pentium Silver series processors. Tremont will likely be made on Intel's 10nm process and features several new instruction set extensions. You can learn more about Tremont's new features at AnandTech.
A key question about the Tremont is what architecturaly improvements it will bring. While Intel's document does specify the new instructions, it doesn't offer any general architectural insight. Intel's general trend thus far since Silvermont has been to gradually widen their out-of-order execution design, starting with two-way, moving to three-way (Goldmont), and then to a three-way front-end plus a four-way allocation and retirement backend. So it may be that we see Intel go this route, as they already have a number of tricks left in their bag from Core, and it meshes well with the high density aspects of their 10nm processes, which favors more complex processors.