I'm wondering what this refers to. I don't recall him saying he was "screwed by Warner."
He didn't. He does comment from time to time that the contract that he got, since it was his first TV series, wasn't as good as it might have been. But he's never indicated that WB has been anything but honorable toward him.
BTW, for those interested, a newsletter came out today with the news that the 'debut discount' period for B5-20 has been extended all the way to July 31.
In addition, there were a couple of fun things added - a 'stump the fans' and a 'name that image'. 'Even' I didn't know what the image was...but I do now!