In an iteration-based project, the project team should collaborate with the stakeholders frequently and continuously to ensure that the product meets their expectations and needs. The project team should also identify and resolve any impediments or issues that may affect the delivery of the product. By holding a touchpoint with the marketing team before the demo, the project team could have aligned their expectations, clarified the requirements and constraints, and addressed any potential risks or challenges. This would have helped to avoid the issue of the marketing team needing more iterations to launch the product and not starting their work yet. References: (Professional in Business Analysis Reference Materials source and documents)

PMBOK Guide, 6th edition, Chapter 5, Section 5.1.2.1, page 152

PMBOK Guide, 6th edition, Chapter 6, Section 6.2.2.1, page 191

PMBOK Guide, 6th edition, Chapter 13, Section 13.2.2.1, page 507

PMBOK Guide, 6th edition, Appendix X3, Section X3.2.2, page 718

PMI PMP-Project Management Professional Practice Exam Q. 781 to 790