Possible Serenity sequel?

We know you love Firefly and Serenity. Gosh, so do we, and the fabulous cast and crew that put the 'Verse together. So we know you'll share our joy in this rumour (thanks Empire) that there could be a sequel to Joss Whedon's SF movie. Alan "Wash" Tudyk told Moviehole that Universal says "let’s do another one". Nothing more concrete than that at the moment, but if it is true… oh boy…