Saw it on Saturday after re-watching the original on Friday since I hadn't seen that in probably over a decade either.
I hadn't followed the sequel much, but I was surprised to see it start right after the original since there was a video game about the whole Underminer story. I guess that game wasn't canon then. The movie was great though, Screenslaver turning out to be just a random pizza delivery guy under mind control was a twist I didn't see coming. I understood more of the original this time too, as a lot of it went over my head as a kid. Especially the part at Mr. Incredible's job.