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It's recommended that a week long spike be done to verify the general approach outlined and determine LOE for modularizing a small piece of the v2 UI dependent upon the results of the UI re-usability spike with regards to RESTful API design. Given that this level of modularity is certainly more work, it should be reserved for reducing forking in "heavier" workflow-oriented UI, and therefore this extended spike should not be needed as a further input to the current estimation exercise.
Resources
Using RequireJS in AngularJS Applications: http://www.sitepoint.com/using-requirejs-angularjs-applications/
https://docs.angularjs.org/api/ng/function/angular.module
AngularJS Modularization (we're modular already): https://www.safaribooksonline.com/blog/2014/03/27/13-step-guide-angularjs-modularization/