Canon doesn't really matter much as far as Superman, or comic books in general. The new JJ Abrams movie script is about how Krypton doesnt blow up. um... yeah...
Jor El: Sorry hunny, looks like I just shot our son across the galaxy for no good reason... hehehe...
I don't know.. they've kept that intro to clark and lois now in all of his comic relaunches, in the old lois and clark show and even in the latest superman: rebirth comic series... I thin the smallville writters know they have some play but they've been pretty good about keeping the big stuff in line... like lana and clark never getting together, clark and luthor being friends early on, stuff like that.