Here's what I really hope will happen there one day. This is admittedly just my blue sky idea.
One of the things that BGT does not do well right now is it's front-of-park statement. As it currently stands, you walk through the "main street" with a few shops, then are immediately face by the dated Zagora Cafe quick service location. Beyond that you have the currently standing-but-not-operating-and-now-rotting Gwazi. Not my idea of a great entry.
What if they took the opportunity created by Gwazi's closing to revamp that whole chunk of land and beyond? Tear down Gwazi, Gwazi plaza, and the Zagora Cafe, and you have a LOT of space to refurb the entrance statement for the park. They could replace Gwazi with the station for a B&M Giga, which would then climb over the bird gardens and traverse the park boundary up to the area next to Congo River Rapids and back. While doing that, they could also replace Zagora Cafe with a modern (and air conditioned) quick service location and rework the traffic flow as well as the Gwazi plaza area. As icing on the cake, they could update the Gwazi field event area with a new stage, and maybe even permanent seating for events and concerts, tying it all together to fit with the new coaster.
Will this every happen? I doubt it. But to my credit, when I first rode Maverick in 2007 I thought to myself "gee, wouldn't it be cool if Busch Gardens did something like this?" Cheetah Hunt may not be quite as exciting as Maverick, but hey, I was close.