You know, rather than saying what we arent getting, like you are more in the know than the rest of us, Why not allow us to speculate?
There is plenty of good reason for Busch to build a 300ft+ coaster. Plenty... But even I dont even think it's feasible, but we got a few people posting on here who obviously know something who wouldnt be posting this rumor if there wasnt good reason to believe it.
Reasons to build a giga:
1.Kings dominion just opened what is being hailed as one of the best coasters ever, even with the trims and is billing it as the tallest fastest coaster on the east coast, which it is(unless you would like to count kingda ka).
2.They upset alot more people then many of you may ever know by removing the big bad wolf. I dont know if you guys realize it or not, but Busch is a staple of family fun and entertainment for the whole 7 cities. Busch Gardens is like the mom and pop ice cream shop down the street for alot of families, unlike just about any other theme park I've been to. Everything there means something to a few generations of families. They need something huge and unbelievable to make up that loss, and Blackstone is more than willing to back them on it I'm sure. Just look at some of the rides that have been built in their other parks. Virginia is home to alot of coaster lovers... Ace was founded at Kings Dominion, and officially became Ace at Busch... Personally I believe that says alot about the local area...
3.They know we like HUGE rides, and Busch has been home to the biggest tallest coaster in the area up until KD built i305
4. They will gain more out of state guest if they can have a "Biggest on the east coast", "Largest <insert gimmick here>", "Only one of it's kind"... That's why parks build monster coasters, and it's all the more reason to give fire to this rumor(and the 2014 rumor).
5. Expansion. Busch needs it. It's not like they are a small park, but they hardly have any rides compared to other parks it's size for the average park goer. King's Dominion may always seem empty, but they have TONS of attractions eating people and keeping them out the path... Busch doesnt... KD always seems empty to me too until I try and hop in the line for any of the coasters and realize everything is an hour plus wait, then I realize all the "Uber flats"(I.e Drop zone, Tomb raider) are 30-45 minute waits as well. It's got nothing to do with poor operation, Just means lots of people are in the park and they are occupied by the attractions. All the people on the pathway at Busch is NOT a good thing...
Reasons not to build it:
Kingsmill.