So to bring this back to BGT, here are my thoughts for the next 5 years. This is a balance between what I think they will add and what I want to see, I've tried to keep it fairly realistic.
2018:
This year would be a "triple punch" much like SWO in 2017 with an enhancement to an existing ride, some sort of animal upgrade and new entertainment. So we already know that they will be enclosing Sand Serpent. This could be a really great move giving them a ride to operate in bad weather, they could add theming, audio & effects to make it a fantastic ride! I also hope for a new Permanent Ice Show to open in 2018 alongside an upgrade to the Walkabout Way animal zone, which is one of the more neglected areas of the park. I also think Summer Nights should be beefed up in 2018.
2019:
B&M Hyper/Giga, with the station where Gwazi is. Crucially, it would have to be taller than SheiKra & Mako to be marketed as Florida's tallest roller coaster. This way, SeaWorld would still be able to market Mako as Orlando's tallest as they have been doing. (It's almost like they didn't mention Florida's tallest on purpose.) A lot of space would be left for BGT to do future expansions and/or expand their event space. Airtime is something that BGT lacks, I really hope their next coaster delivers on it. I did contemplate RMC Gwazi for a while, and whilst I'm not ruling it out entirely, it does seem increasingly unlikely.
2020:
A fairly quiet year park wise, but the new Resort Hotel could open this year. I think the hotel will open in either 2019 or 2020, but opening it in 2020 could give the Busch Gardens brand some publicity in what would otherwise be a very quiet year.
2021:
WATER! For 2021 I think the park needs a new water ride. I hope they will install a Mack Rides water coaster on the Tidal Wave site. It should be very different from Journey to Atlantis at SWO. It would be a fantastic ride for all the family and would help to relieve some pressure from Stanley Falls and Congo River Rapids.
2022:
I think this will be an animal attraction year after ride investments in 2019 & 2021. What could it be? Well I've always thought that a large air conditioned viewing area for the Elephants could be a huge success. They could even market it as a large new Elephant habitat which I'm sure could pull some crowds. I'm thinking of a large, thatched roof style building in Nairobi with huge glass windows looking out into the Elephant habitat. If they made the building have two floors you could also get great views of the watering hole!
Anyway, that's just my thoughts/predictions. I may be right for some, I could be completely wrong. Who knows!?