I don't see them doing that. The Annie came down from it's MSRP price quite quickly. It was found at $400 relatively early, and now at least one seller has been constantly selling it for $400 or less with coupons.
At $375 right now, I'm tempted on rebuying the Annie. Buying a new Q701+Annie pads will be around that $325, and that doesn't even include the headband swap, which makes all the difference to me in comfort. No one likes the bumps.
I'm sure the K712 Pro will start around $400 street price, but go down to just over $300 soon after.
Even the K701 had a high MSRP. Now all these headphones hover at the $250 range.
I know what you're saying but I bet the Q701, K701 and K702 will be discontinued. The K712 fills the void and is MSRP will be exactly what the Annie will be, but that with some careful searching, you'll find the dealer who can get them for $350 or $375, etc. But I'm a pessimist... They won't sell for less what they can charge more for. And the Annie proved what they can charge.