#4. Lesnar wins a competitive match
Among all the possibilities, WWE could prefer to go with the two wrestlers having a highly competitive match that ends with Brock Lesnar retaining his WWE Championship. When we look at the last few Survivor Series events, Lesnar has defeated smaller wrestlers like AJ Styles and Daniel Bryan after highly competitive bouts.
Lesnar enjoys working against smaller opponents, and that could very well be the case again. Lesnar can be dominant initially before Rey pulls off some extraordinary maneuvers to take him down. It's a guarantee that Lesnar will sell so well and help make Mysterio's offense look believable.
In the end, Lesnar could retain the title, but only after making Mysterio look strong. Although it's not a surprising outcome, it gives fans a potentially show-stealing match and at the end of the day, fans have paid their money to see entertaining matches. Unlike some other scenarios, this one could actually be embraced by the WWE Universe.