The EOS R5 was the perfect replacement to my secondary-body 5D mark III that I've been waiting for, so now the game is waiting for the EOS-R1 to replace my 1DX Mark II.
Ultimately the main reason for me wanting to fully switch is RF glass. My ideal set up for paid work right now would be the 28-70mm F/2 and the RF 70-200mm f/2.8, but as long as my 1DX Mark II is in my kit, one of my cameras is limited to EF glass.
As for lenses, I guess I'm a bit conflicted overall. I have a lot of existing RF glass(28-70, 70-200, 85 either 2 or 1.2) to buy which is going to be pricey, so I'm not sure how long it'll be before I can get to something new. But if Canon releases the 14-24mm f/1.4 or F/2 lens they've patented, that could be really exciting and would probably end up in my bag at some point. Another thing I'd love to see is a 135mm f/2 update, though I'm concerned that would end up expensive enough to offset part of what made the original 135mm so special in the first place.