The next track is Spa-Francorchamps. One of the lovely tracks in the calendar truthfully. It's been under the domination of Hamilton and Verstappen in the last 5 years. But this is very likely to change unless we see some surprises -
by an impact of the weather also maybe.

^ Red Bull is a huge possbility as it wouldn't be farferched as I already said. If not, then there's a couple more of options for Russell. There's the new team Cadillac and Alpine has a seat available. The former is kind of a bad team to land in with Russell's F1 resume but the latter is a pretty good destination imho.
And yeah, pretty sure Verstappen has already started some negotiations with Mercedes. I hope it pushes thru and we get to hear Verstappen and Bono on the radio.

Russell shouldn't sign for a lower team than the ones in top 4 right now. As there is no room at Ferrari and McLaren he should just continue his career at Red Bull.

Cadillac... I don't know about this. We literally have no idea about how fast their car will be right? For now at least. I don't think Russell would like to take that risk. He is one of the best drivers on the grid.