Tiled Imagery DataSources

I am working on a project where we have tiled data imagery (jpeg2000 tiles) that changes over time (seconds). I am trying to determine the best way to view this data in Cesium. From my initial searching I think my best bet is to us the Quadtree Primitive (which I know it is a private API). I think I need an imageryProvider as a data source that changes based on the current time.

I know the 3d tiles branch as temporal tiles on their roadmap, but not sure how long till it gets done. I do not think the Entity API has all what I need. I only what to display the tiles currently viewable at the correct LOD. Is it possible to use billboards and have LOD ?

Looking for feedback, Thanks