There are many forms of motorcycle racing already and fat guys tend not to win any of them.It looks a really tough track, and with all the rain, it's going to be a real test. A total mudfest.
Will be interesting to see tyre choice; fast, XC tyres aren't going to work; so a proper mud tyre looks the way to go.
As said, Nino tends to dislike the wet & mud but a World Championship is on the line; it wouldn't be a shock to see a new winner - pick a name...you'll get a good run for your money.
For the women, PFP is an obvious favourite; but with the conditions, who knows? With the mud, you'll probably need serious power, and the lighter weight riders might struggle?
As for the e-MTB races, I don't have a problem - the best riders will still win, it just adds a tactical part to the race; when and where do you use it? How much have you used/ got left? I've got the impression people think some fat, overweight guy will turn up and win. E-bikes are here to stay, so the sport has to reflect that. It will eventually become a serious championship.