This idea has been merged into another idea. To comment or vote on this idea, please visit APP-I-1767 On our way to Initiative Roadmap Nirvana - Priority 3 of 3 - Ability to see the size of an initiative in story points or time.
We're working out our roadmap for the next few quarters and getting high level estimates for initiative level items is a must to help our customers prioritize their big asks. This can be done with features and requirements, but not initiatives; there also doesn't seem to be a custom field option for this