Yeah, sure... like the 147 a few years back...
Only a handful of people can make a U47, and I don't think the good folks at Neumann are amongst them. It's not that they COULD NOT do it, but they CAN'T make U47s again because, well, they're not a "boutique" mic company. A U47 clone is too expensive to re-make. A true U47 needs a VF14 and there's no equivalent right now. So you'd need to have the VF14 cloned... the transformer, no biggie; the capsule, Neumann have that covered! But the tube, no.
If they release it as a "U47-inspired" mic, fine, but then isn't it what the 147 is already???
Take a look at the neumann pinboard archives... even the good folks at Neumann agree. Just like AKG cannot possibly make a true C12 clone... there won't be no U47 clone from Neumann.
JP