Nuendo 8 - Sales offer

Hello,

I am still on Nuendo 7 and have been waiting to upgrade to 8, and will certainly upgrade to 10. My question is, does this mean that the cost for upgrading will come down from what it presently costs to upgrade from 7 to 8, or will that remain the same? (Or will it go up once 10 comes out?)

Thanks so much,
Ernst