As far as I know, the Kuurne-Brussels-Kuurne is one of few Belgian races left with an independent, amateur race organization doing all the work (paging Echoes for any updates...). It isn't part of the Flanders Classics package and you will get to see it on TV if you want to.
The race's slogan is " Hier ontstaan legendes" - Here legends are created if I translate correctly and from the sound of it, they like to open their doors and let the talents come in to race. It is the day after the
Omloop (always) it has a few less cobbled sections and hills and a long relatively featureless ride to the finish line after the (insert last obstacle) has made it earn its reputation as a race that suits the sprinters better than the Omloop. Only for it to be won on quite long solo breakaways on a number of occasions the last years. In other words, the
parcours that does look a bit less exciting on paper has seen plenty of interesting racing because the riders have made it so.
Looking back at the previous few years, either you attack solo and go all the way in (Jasper Steuven, Bob Jungels, Kasper Asgreen) or you are a damned good sprinter (Groenewegen-18 edition) or you could make it to the finish with a small group of classics riders (Sagan). If not, Kristoff comes, and he will take the sprint in the group behind.
Let's look at the parcoursNo, it is a secret, apparently. I think that is an anti-covid-policy, trying to avoid all the fans getting together and getting drunk. Probably not very effective as someone will find out anyway.
I have heard that they are going over the Tiegemberg, and as the first race of its kind it has adopted a special protocol to Keep

Oliver Naesen still in the race afterwards. Finally there is a way to overcome the now infamous Tiegemberg complex.
https://twitter.com/OliverNaesen/status/1364579694155354116
OK, how about the teams and the riders, then...
Apart from Oliver's

AG2R-Citroën team there will be the other ususal suspects from the world tour:

Decuninck Quickstep (watch out for all the team, as usual, but Asgreen won last year.)

Trek-Segafredo (Stuyven, Pedersen, Kirsch and Theuns ... this is some line up!

Bora-Hansgrohe (Politt)

Ineos Grenadiers

Lotto Soudal (Degenkolb, Florian Vermeersch)

Israel Start-up nation

Groupama-FDJ (Démare, Küng)

UAE Team Emirates (Kristoff, Trentin)

EF Education-Nippo (Valgren),

Intermarché-Wanty-Gobert

Qhubeka Assos (JF M Gogl it!)

Bahrain Victorious (Colbrelli, Haller)

Cofidis (Laporte)

Astana-Premier Tech (?)

Team Bikeexchange (Durbridge, Jansen)

Team DSM (Kragh-Andersen, Eekhoff, Benoot)
and then there are the hopeful pro teams

Fenix-Alpecin (if he passes the corona test, you know who, but also Dillier and Merlier)

Arkéa-Samsic (?)

Vini Zabú (Marezko)

UNO-X Pro Cycling team (Hoelgaard, Halvorsen)

Total Direct Energie (Terpstra, Boasson Hagen)

Bingoal-Wallonie-Brussels (?)

Sport Vlaanderen-Baloise (?)

B&B Hotels p/b KTM (?)
With some exception I don't really know these ProTeams.
Who's going to win?In terms of team strength we always start with Quickstep, don't we? It is classics season again, it's Belgium, it's home ground advantage, it is high expectations. They have some 7 riders that can win and they know how to stage a tactical battle.
However, this year, DSM also looks like a strong contender, with a slightly younger but also very strong crew of multiple possible winners: Both Tiesj Benoot and SKA are capable of riding away Steuven style, while Niels Eekhoff may be able to finish ahead of a few contenders in a sprint too. If that's not good enough there are a few others capable of landing a top 10,
Trek also has a strong team, with Mads Pedersen as perhaps the best suited to this kind of course as he can hold on across the obstacles, doesn't usually have a problem with the distance and sprints well in a reduced bunch sprint too. They bring former winner Stuyven as well,plus a couple of other options.
Apart from these strong teams, we may see Mathieu van der Poel win.
However, all this is theory and never before has the season preparations been so troubled by diseases and changes of plan, except maybe last year - but my point is: watch it, something unexpected could just happen, maybe, as the slogan says: " Hier ontstaan legendes" this Sunday.