https://www.olimex.com/Products/DIY-Laptop/KITS/
The Cortex-A55 is the successor to the Cortex-A53. When can we expect a TERES with it?
when there is available A55 SoC, which is more powerful, has more features than A64 and comes with complete mainline Linux support :) otherwise there is no point, there are probably hundreds of different SOCs which could be good candidate for TERES new board, but unless they bring something new and full Linux support we do not see much reason to spend time on them