Matt Devillier (MrChromebox) has posted several times on r/purism that v5 will come by the end of this year, but he just posted “TBD this year” and it will likely be a 10th gen Core CPU with at least 4 cores and likely have USB Power Delivery. From that info, I’m guessing that the CPU will be a Core i7-10510U (Comet Lake-U).