At the time of production, when jms told us the Garilbadi story had been shelved, all of us were pretty disappointed. Some voiced it while most just stored it in the "Here We Go, Again" category, no doubt due to constant set backs in the B5 Universe. Personally, I didn't even bother and I had pretty much thrown the towel after TMoS got the Axe. And I can tell you these constant set backs struck home for him just as much as it has for us.
To make things "worse", jms has not been around as much in the news group that has been, for way over a decade, THE place to be if you wanted to be in the loop with his projects (B5 or otherwise) or just talk about politics, society, etc.
As far as I know, he was contacted by WB last year. What for, he couldn't say at the time.
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"Frak it. Gotta roll the hard six."