I do not usually post about rumors, but this was interesting.

To make the R5 "viable" for another year, the rumor is that it will receive a major firmware update that will include a few new features. What caught my eye was what I consider the #1 thing I would want from the RAW that could be adjusted by firmware, RAW Burst Mode (here called "Pre-shooting Buffer"). The R3 has it, the M6II has it, even my M6 II has it. But not the R5. This would be a very nice feature and one that I would use fairly often. As others mentioned in the comments, I would share the hope of getting additional options to 20 fps for electronic shutter, something like 5/10/20 fps would be great.

Everything else, we'd have to wait and see.