IA will go on for quite a few more years I suspect. The pace (sadly) seems to have slowed, but there's simply too much wealth of material to draw on and a solid fan base (both for IA and Star Wars gaming in general) that I doubt we're facing a gaming closure at any point soon.
personally I feel part of the slowing of pace is due to design capacity being diverted elsewhere. Destiny possibly had an impact earlier in the year, but more likely the creation of Legion has eaten massively into the SW gaming design space. And that's before you consider the marketing element - they want all of us to buy into Legion in a big way; releasing somewhat overlapping products at the same time doesn't seem smart.
I don't anticipate seeing another box release until Q3 2018 at the earliest. But it would be nice to see a blister wave before then.