I think the rumors about his own show was like, Michael Dorn said he thought it was be a good idea and somebody put it in an article.
It's true Worf does have a way of having his enemies die. And there's that part in DS9 where he beats the Gem'Hadar by continuously being beaten up until the Gem'Hadar gets so bored with hurting him he quits.
It seems itīs a bit more then that. Apperantly they actually had a pilot script written.