Dire Bare
Legend
This stumped me as well. It seems so obvious a choice. Partnering with LWE would mean a character builder within weeks. An app could follow shortly, already being available for Pathfinder.
Lone Wolf is a good company, but I've never liked the interface for any of their products. I haven't really been impressed with any of the existing RPG tools that I've used or seen previews for. Not saying they don't get the job done, just not in a way that's gotten me to plunk down some cash. I imagine WotC would prefer something a bit more polished and smooth, as they do have higher expectations as the big dog in the industry.
The best explanation I can think of is that WotC really wants a reference app. A searchable program (not unlike the HTML Basic rules) that can be purchased for the core rulebooks, which they can offer in place of PDFs. And they want the same company to offer both, so people don't have to buy electronic access to the books twice.
All I know is that WotC likely DOES have plans, or is in the process of developing them. Hopefully fourth time is a charm! But they won't divulge a peep until think are pretty locked down, to avoid the inevitable internet cranky fest.