I wasn't a fan of Keenser myself, but then again, it would be quite sad if Scotty had spent 6 months on DV alone.
Such isolation could do weird things to people!!
As things stand, he could appear in the sequel or not based on how we last saw him. Up to the writers. I wouldn't include him myself, but not up to me.
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist