Syncing Animation on layers to allign with base layer timeline

Folks,

I have multiple slide layers that I am using for a magnifying effect. The base layer is a picture of a book and as the user hovers their mouse over the various sections of the book, slide layers are triggered that contain a magnified view of that part of the page (one that is readable). What I'd like to also do is have some animation on the slide layers that allow me to highlight various sentences, bullets and words aligned with the audio on my base layer.

Thus while the audio is playing on the base layer, uninterrupted by layers. the animations is following me on the various layers. If the user hovers their mouse over the area I presently speaking about they will see the magnified part of the page along with my synced animations.

Is there a way to use a variable to start timelines of a layers without showing it till it is called for by the mouse hover? Basically syncing all the layers and base to follow one timeline.