X5 will follow the E90 3-series formula: almost identical shape with a completely new skin. This is called evolutionary design.
No need for rush and total redesign, since it is only 2nd generation of X5. And the current is a winning horse, so ... Really no need for a revolution. Yet.
Yes - the shape is very familiar, since it is almost identical to the current X5. Styling is contemporary BMW: prominent flame surfacing. FS is not clearly seen on spy pics, but it is there - very prominent.
Front will be very aggressive - very BMWish: "Move out of my way, or I'll gonna eat you".
The back could appear a bit bland - especially due to almost identical shape of rear light clusters - but the graphics are more dynamic: the CELIS LED stripes make the car look lower & wider.
Interior follows the 3er / 5er theme. Materials and fit&finish are on very high level though.
The whole appearance is very fresh, modern & dynamic, with a strong touch of aggressivenss - but still evolutionary. As I said: compare E46 3er to E90 3er.
There is one perfect word describing E70 X5:
beefy. Very muscular, powerfull, aggressive, sporty SAV. Narrower greenhouse contributes to even sportier look. If you think Audi Q7 is aggressive, just wait to see E70. And I'm very eager to see test comparisons of on-road performance of AWD systems: quattro vs. xDrive. There is a huge surprise coming on!
IMO E70 X5 will be really well received, and it will be an instant hit - again. Despite all the competition.
Btw, if you want a revolutionary and more exciting design you should wait for X6 Sport Activity Coupe or V5 Luxury Sports Cruiser (aka RFK).