Eh, I've not done an item suggestion list in a while, but since I was told this was a good one...

I think a Dynamic waterfall BG inspired by the Lovey Dovey scene in Lion King would be an epic background! As well as..

2. A pride background BG (a background featuring lionesses and their cubs)

3. A river crossing BG (perhaps a few variants featuring wildebeast or zebra on a migratory crossing)

that's it! if you want to support the gooo for it!