It feels like they definitely want a rematch. If you really pay attention to how it was booked, it was actually similar to Brock's UFC debut. He started really aggressive, then he took his eye off Golberg for one second and it cost him. This wasn't exactly Goldberg dominating Brock through a hard fought war of titans, it was Brock made one big mistake and it cost him.
Like I said before, Goldberg wasn't in shape for a proper, long match last night. The match literally was set up because of that one ESPN interview, it was never part of the original plan. But given enough time to get in ring shape, the rematch could end up a lot more interesting. In a rematch, Brock won't be as cocky.
Leading up to the rematch, Brock may feel he has something to prove too. He's grown complacent with his spot at the top of the food chain. Now he's not the biggest monster in the WWE anymore, and he's going to leave a trail of bodies in his wake as he reclaims that spot. With Heyman hyping this type of approach, we could actually see the best version of Brock.
This loss also gives Brock a goal for however long it takes to get a rematch. They won't need to put him in the title scene at all to keep him interesting. Other superstars might see weakness in him and want to make a name for themselves at his expense now that he's shown weakness. He's pretty much the new undertaker, where losses will only count at Mania now.