I heard they are going with the mobile chipset, Snapdragon 4 which is better than the Snapdragon 2 I guess. You'll have to buy a separate first party accessory, the Wii-Fi receiver to connect to today's standards cause the chips aren't capable of connecting to them obviously. It's a bold move by Nintendo but if the Switch proved anything, it's that they can pull off miracles with already severally outdated hardware.
It will have a STN LCD screens made from leftover Gameboy screens and solar charging as part of the "save the earth" initiative. It will come with a sling case for those on the fense due to size and weight so they want to squash those concerns from the rip. Also I hear they gathered a bunch of Dreamcast controllers and recycled the hall effect sensors for the new model, so more drift. Lastly it'll utilize a VMU like device made from, you guessed it recycled Dreamcast VMUs. So it'll essentially have two different mobile features it's almost mind boggling to think about.