DVD sales are what determines the existence of a show these days. If something sells well it either gets greenlighted for another season or for a TV movie... that's what happened to Family Guy, American Dad, Stargate SG-1, the movie Serenity was made because the series it was based on sold millions on DVD etc.
I'd be surprised if this doesn't come out on DVD.
And Brenda's return is a massive deal... it wouldn't surprise me if they released "The Brenda Years" boxset
*hugs*
xoxoxo