Is it possible to release packs with new players?

I want to pack a single project, after having the 1.0 version I want to add 2 players and 3 items, pack the project and send it as pack (1.1) to 1.0 version.

After that I want to add 5 new players and 10 more items (it is just an example), and send it to the original pack and use the new players. Is it possible?

I mean, I want to send updates from my original executable and just load the new items I’m making. I want to do it by this way for reducing the size of my project.

For example. My app size is 1.0 GB, after adding newy players, items, and landscape, it size is 1.2GB, but i just want to send the 0.2 GB i just created insted of sending again 1.2 GB. After that I make a new modification and the new size is 1.8 GB, and I just want to sent the 1.2GB-1.8GB difference, I mean, 0.6GB.

It is possible?

Any suggestions?