Definitely tricky Jennifer!
I would lean heavily on the CRM/Salesforce to manage lead lifecycle, because you can customize it to each BU with record types and roles.
Marketo should just act as a facilitator to move leads to different statuses based on activity.
For lead scoring, you can create BU specific scores. There are different posts I believe on this subject, but the main idea is that you categorize your campaigns and website pages, so that when a lead interacts with a certain type of content, then the specific BU score is adjusted.
Hope that helps!
We are actually using the Dynamics CRM integration which is more limited than with Salesforce.
With that in mind, is there anything else I should keep in mind?
We are in what sounds like a similar situation. Our CRM is not the DB of record (it's not Salesforce), so we upload a custom DB to Marketo and wish to use a multi-model Lead Scoring solution to track engagement across 12 different product lines.
I am curious what solution you settled upon? I have attached an image of the nurturing journey we have in mind and am curious how closely this may be to your vision for nurturing prospects along the path toward a specific product line?
You are further in the process than we are at the moment. We are still trying to determine our strategy for for tracking the buyer cycle across multiple brands and product lines. Currently we have silo nurture programs in place for each product within each brand however I am sure this will evolve as our strategy comes together.
Thanks for sharing your progress and if you have any other findings to share throughout this process, please reach out.