Aside from the weather being how it is in Spa, generally keen to see how this one plays out between Mercedes & Red Bull... both have strong engines and very quick on the high-speed bends so should be close between them. Feeling Mercedes will edge them out a bit seeing the recent races power wise, but could be wrong.
I don't think McLaren will be in the fight for the win, as some seem to be suggesting here and/or elsewhere, but they're surely favourites for best of the rest; They've got impressive Top Speed which will prove incredibly handy here, either for overtaking or defending... Norris could very much make things difficult for the likes of Bottas and Perez I feel! I also wouldn't discount Aston Martin here either. Mightn't have the pace of McLaren, but with Mercedes power and a steady increase in pace compared to the start in the year, potential 4th strongest team here I reckon.
Alpha Tauri (well, Gasly!) will be in the mix... Honda power and a decent enough Chassis, could very well be well into the Top 10 by the end of Q3.
Hope I'm wrong, but I'm seeing this one as a struggle for Ferrari... lacking a bit of power on everyone at front and their new Power Unit updates aren't due for another few races apparently. Should score some points, but might struggle to get both cars into Q3. Saying that though, their race-pace has been VERY strong since France so could make progress, though this isn't a track with high-tyre wear so any advantage they have will be minimal...
Alpine is hard to predict... they usually seem quite strong in a straight line and previous years have gone relatively well on the high-speed/high-power stuff... but think they'll be the back end of the midfield here.