J.J. Abrams spoke at the Wondercon Star Trek panel, and answered a fan question about Cloverfield. Take it for what it's worth, but it sounds like the same old story* to me:
We have an idea that we thought was pretty cool that we’re playing with, which means there will be something that’s connected to Cloverfield, but I hope it happens sooner rather than later because the idea is pretty sweet.If there ever was going to be a sequel, now would be the time to start it, and release the trailer during Star Trek in May. They wouldn't even need to film the whole movie - just the trailer, like they did with Cloverfield.
* See Also:
- Cloverfield Director Matt Reeves Talks Sequel
- Matt Reeves: Cloverfield Sequel On Hold
- JJ Abrams on AOTS, Matt Reeves interview
- JJ Abrams Talks Cloverfield Sequel, Dark Tower