If, upon review of their case, it is determined that they were illegal combatants that are not covered by the Geneva Conventions, do they go back to Gitmo indefinitely? What happens after this review if the court says that they are not to be freed? Has anything changed in that regard?
Yes, the taxpayers are out lots of money for lawyers and the courts spend time delaying justice for cases they should be hearing.
No good deed goes unpunished. Under the Geneva Conventions, combattants who do not follow the rules of war as set forth in those conventions (including carrying arms openly, wearing identifable uniforms or insignia) can be subjected to summary justice on the battlefield as spies or saboteurs. We decide to let them live and house them in a relatively cushy prison, and we get nothing but grief for it.