I believe they said each writer is in charge of the writing for a companion, with one writer having two. So that's 13 companions, I think, if I have my writer count correct. There will also be the ability to recruit mercenaries.
Do you remember where you saw this? If they create 13 companions it will be alright.
Yeah 13 would be nice, but as some others have said, I also doubt we will get that many. And anything less would mean, once you account for alignment and class distributions and personal taste, you will be lucky to find even three companions that you both personally like as well as who work for your party's needs.