"The Company is in the process of entering into expanded agreements with certain Scientific Advisory Board members and certain other key consultants whom the Company anticipates will play important roles in helping the Company prepare for potential applications for regulatory approvals of the DCVax-L product. The agreements are being negotiated around structures that are contingent upon major milestones and will provide substantial incentive compensation."
Translation - they're negotiating how many options/warrants these people get depending on the degree of success.