Historically, when Apple released a new iPad, iPhone, or iPod touch, it has very often kept around last years model at a reduced price.
And most of the time it's one model, with the same or less storage compared to the low end of the "new" model, and $100 cheaper.
Does that mean next week we'll see a 16GB model of the current iPad mini stay on sale...for $229? Interesting if they do, that's the same price as the low end 16GB iPod touch. I'd guess they'd either drop the iPod touch price a little to $199, or make that model iPad mini be $249.
They've never increased the price of iPads, but this might be the time to do the Retina mini at $349 and the current non-retina at $249. Keeps that $100 price separation.