That's a pretty damn quick turn around, in my mind... Unless they already have scripts in draft/development.. Or then again, maybe that doesn't matter...
I don't want to see original roles recast... Unless Mark Hamill is in there playing "wizened old Jedi Master," I'd rather see this take place farther into the future... Technically speaking you could have the droids and Chewie of course, but there's no way Ford will do it and, not to be too indelicate here, but I don't think Carrie could hack it.. Just my opinion, of course...
I'd rather see a, ahem, "next generation of Jedi" twice removed, dealing with some new threat to the Republic...