As much as I would like a new Metroid starring Samus (still holding out for a followup to Fusion), I do want to try and look at the glass hald full here. Getting to play as the Galactic Federation could allow for further world building. Getting to see how the Metroid universe functions outside of Samus and her escapades could be breath of fresh air. It could also lead to new discoveries that could have an impact on future titles, including ones that have Samus.
....Or they could completely ignore any world building, at which point I would be more disappointing that they dropped a perfectly good chance to do so.
....Or they could completely ignore any world building, at which point I would be more disappointing that they dropped a perfectly good chance to do so.