My prediction is that we'll see some upswing in the use of Conspiracies, at least in casual play if not at the top - both from better Conspiracies and more cards that enhance them like Amaranth.
Will it be enough that older Conspiracy cards start showing up? I don't know. I suspect that with some more Conspiracy-supporting cards we'd find that the existing ones work well enough to include once we get over our predisposed notion not to use them.