WWE has been talking about starting to tape NXT bi-weekly instead of once a month. This is due to the popularity of NXT rising since it debuted on the WWE Network. Also, things always come up where taping once a month becomes a problem.
For example, when JBL needed to strip Paige of her NXT title.
With this change coming look for NXT to have some featured replays on RAW and Smackdown as well.