Here are some possible match-ups that look like they are on - as follows:

Xhavit Bajrami vs. Daniel Ghita

Hesdy Gerges vs. Errol Zimmerman

Ben Edwards vs. Singh Jaideep

Mourad Bouzidi vs. Kyotaro

Peter Aerts vs. Melvin Manhoef

Sergei Lascenko vs. Rico Verhoeven

Badr Hari vs. Anderson "Braddock" Silva

  The last fight to complete the Final 16 is yet to be confirmed. One would like to think Tyrone Spong would be added along with last years winner, Overeen.
Spong has had knee surgery and it's unclear what is going on with him at the moment as he's been in the USA for the last three months. And last years WGP winner Alister Overeen is also unlikely to compete he has signed a monster contract with UFC.

The most surprising of these matches above is the return of Peter Aerts. It was not clear if the three time winner Peter Aerts would return to the K1 kickboxing WGP at all, however, it seems he's going to give it another shot at a the World Grand Prix. Aerts stated last year, he wasn't sure if he could still do tournaments at his age.