I'm just curious to know if there are any plans for Add-on packages to be realsed in store, just like Fallout 3's two add-on packages which had Operation Anchorage & The Pitt + Broken Steel & Point Lookout respectively.

Has anyone heard of any news on this topic?

A dev confirmed that there won't be any packs like that released for NV.

Supposedly, they've said the same about a GOTY, but I've seen nothing myself on that side.