Hosted Map Image Layer

[CMcDonald]

Portal for ArcGIS allows you to host Map Image Layers, ArcGIS Online should be able to do this also.

Map Image Layers are great if you have dozens of Layers and you want to have sub groups i.e. Departments, Themes etc. to make Layers easier to view collectively and without the need for long extended titles such as 'Admin Boundaries - City Boundary' 

[KoryKramer]

Maybe a duplicate of https://community.esri.com/ideas/6854 ?

[AndreaB_]

I think it is similar to that other idea 6854, but this one states a more important function. Please implement Hosted Map Image Layers for ArcGIS Online. We can't move fully to AGO without it at the moment.