Does FFG have the rights to ended lines? Like Squats and Araby? I would love to see the Squats come back.

I suppose they have the rights to Squats as much as they have the rights to anything 40K. However, they'd probably still need GW's permission to use Squats in anything, and I'm thinking GW probably wouldn't be too keen on reviving races they intentionally discontinued themselves..

But hey, anything's possible, right?