If I had a dollar for every time I get an email with that question!
I - like everyone else here - would love DS9 to be remastered in HD next. However, it would be a massive project, far more involved than TNG was.
The simple fact is that there's no news at the moment. Naturally, there's talk about it - but that's all; there are no plans in place and no project has been greenlit. CBS-D are still entrenched in TNGS6, and will still be in TNG mode for a decent amount of time to come.