hellsgate
Commodore
There's always the possibility of a rejuvinated B4 being written into recurring cameos in future DS9 relaunch & TNG novels/literature.
[*] With Troi & Riker now transferred to the U.S.S. Titan, Worf's been reassigned from Strategic Officer of DS9, to Executive Officer of the U.S.S. Enterprise-E (in place of the now-discarded Martin Madden from "Nemesis".)
[*] An appearance by B4's quite likely with all of that water under the bridge and the fact Geordi's vehemently passed up the job of XO of the Enterprise-E (with encouragement in that direction by Scotty,).... even though Geordi was Picard's first choice... so anything's possible.
[*] With Troi & Riker now transferred to the U.S.S. Titan, Worf's been reassigned from Strategic Officer of DS9, to Executive Officer of the U.S.S. Enterprise-E (in place of the now-discarded Martin Madden from "Nemesis".)
[*] An appearance by B4's quite likely with all of that water under the bridge and the fact Geordi's vehemently passed up the job of XO of the Enterprise-E (with encouragement in that direction by Scotty,).... even though Geordi was Picard's first choice... so anything's possible.