User blog comment:KidVegeta/Canonicity/@comment-3097771-20101129081917

Dead zone will stay as canon. The canon inconsistency of Gohan's existence being known to Krillin isn't enough to remove it from canon. This is because, mainly, it is the only inconsistency worthy of any mention. In addition, there is an entire saga (though filler) dedicated to the aftermath of this movie. In order for that to be also overturned in canon, this movie would have had to have broken major canon, which it did not.

Final ruling: ""Canon"". -KidVegeta