I doubt it. It seems an overreaction to me to conclude the ipad mini is dead after one lackluster upgrade, especially when that upgrade followed upon a very satisfying one the previous year. And while the upgrade was minimal, they did at least equip it to take advantage of their newest technologies involving Apple Pay. That's something they didn't do with the iphone 5s, a form factor who's future is I think, sadly limited.
It makes sense that Apple would want to use their limited supplies of faster chips on their more expensive devices for now. But While the mini may not be as popular as the full sized air, from reading these boards it seems to me it still has its fans. And it doesn't make sense to me Apple would abandon this niche after it went to so much trouble expense to develop the mini in the first place, and then to upgrade it to the retina.
But regardless, I don't think it's worth worrying about. The mini serves me well now, and looks like it will last me a couple years at least, and that's all that's important for now. If I'm wrong and Apple abandons the device, I'll worry about it when I need to upgrade, and who knows what devices, Apple and non-Apple, will be available by then.