Well the latest October 3rd patch has already broken the threshold. Continued support is proof that there is still little hope for Kombat Pack 3 (or just a couple more characters). And NRS themselves have said they will keep a close eye on how this new patch will play out and what they can improve.
It's been 6 months since Ed has made a poll which MK characters fans wanted to see the most. Noob and Jade were the winners. We haven't heard anything since regarding that, but before it was hinted at something about "fan service". Now that could also mean just continued support by just patching whatever characters already exist in MKXL, or maybe not.
The latest kombat kast didn't konfirm OR deny the existence of more characters or content still being made. Look at games that claimed that their last version was supposedly their definitive versions. Dead or Alive 5 Last Round has over $1,000 worth of DLC, wtf. They just recently released ANOTHER character, Mai Shiranui. Since the release of that game, there have been 2 or more DLC characters, and hundreds of costumes.
Just give us Noob and Jade, they can make room on the select screen without hurting the layout too much. Maybe 1 or 2 more balance patches, then MKX can be finally done with support and I'm sure most of us would be happy.