No it isn't, that is all just employee rumors. Unless your friends are higher ups (park manager, ect) I'm not buying it
Believe what you want, I really could care less. Just giving a scoop from what I've been told.
Could it be rumors? Sure, I can't deny that possibility.
I personally would consider what I have mentioned to be a possibility. The park issued a statement on billboards throughout the grounds which clearly stated that the Rattler is no longer going to be at Fiesta Texas. Those billboards unfortunately did not tell us whether the coaster is being moved, or taken down for good. Either way - it's not a renovation project.
With the debt situation that has taken control of Fiesta Texas along with other Six Flags parks (i.e. Six Flags Over Texas, Six Flags New England, Six Flags Great Adventure,) it wouldn't surprise me if my friends on staff are correct and Fiesta Texas has actually sold the Rattler.
It's like I said though, believe what you want. I really could care less.