My main question is what kind of cores they'll use. Will they get cores from ARM China (which I assume is still operating as an independent entity?)? Or, will they make the jump to RISC-V? And, if so, whose?
My guess is ARM, just because using a 7 nm-class node will already put them at enough disadvantage. I think there aren't yet RISC-V cores on the market that can compete with the best ARM cores available at 7 nm. Plus, switching to RISC-V would just compound the amount of software work they'd have to do.