So, we did get new versions of Fireball and Polymorph, plus likely a few others.... however, they're
named versions of those spells instead of reprints -
Farideh's Fireball and
Mordenkainen's Polymorph. Makes sense, given that many of these cards don't conform to modern design philosophy, but still worth noting. Other spells -
Fly,
Meteor Swarm,
Wish, etc - are also showing up and getting unnamed versions, since their names haven't been previously used in Magic.
I'll wait for the full set before confirming / denying this speculation, but at this point direct reprints look unlikely. I'll claim half an internet cookie for partial reprints though. :D