There are many professional categories who use powerpoints for sales , technical ,consulting ,marketing and status presentations . It would be great to provide suggested templates to be used by Profession objective or by purpose :
Like what is the object of using ppt : Status , marketing , offering display , decision making , feasibility analysis , new product reivew etc. based on this powerpoint can suggest templates having some market standard slides with sample content.

1) this will help users in building a great story while presenting
2) User will not be missing important slides to include ( like Cost and benefit slide is a must for product review /Business use case)