Well it´s a common theory that Black holes could be an quick transportation or even timetravel portal just with the issue to "survive it"
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For the game it would be hard cus in theory if you make time travels it would either require that the whole system is affected or just an "regional" timetravel that is limited to a certain place. In theory the Stargates would make at least "somewhat sense" cus it could be modified to even reach TC after the Ancients have used from their escape of Siri but then it would mean that a whole system would need to get "new planets" in terms of the optical part at least.
So if we continue to talk about CC and considering that it was the most technological planet it would make kinda sense if somewhere an old research facility could be found that needs to be repaired to create a "time bubble" that only encloses CC and can not affect the other planets in Gemini.