It's funny because this is kind of where things were with Deadpool. Marvel spent years trying to make him happen, and now his solo book sells substantially better since they trimmed down their Deadpool offerings. Rather than force him to happen, they put out a product that connected with readers with Marvel NOW and gave them the room to slowly expand over the course of two years.
His ongoing has consistently sold upwards of 40K since launch and his companion minis sell in the 30K range.
I'm sure putting him in non-print media also helped a bit.
On a side note, I love that Marvel continues to feature Kamala on various covers, right alongside all of the big name characters. I guess she represents the younger generation for Marvel now.