After season 4 and Atlantis is back in Pegasus. Jack is leader of Atlantis. A Christmas one where Aiden and an original character take over Atlantis to save Aiden's son. There must be Sheppard/Teyla and Jack/Sam.
Crossover with NCIS LA. Ronon is arrested by Team Callen for whatever reason and they attempt to question/interrogate him. Meanwhile, Sheppard + Jack try and get him out of there. Back at OPS the Meerkats try and find anything on Ronon, Sheppard, etc, but end up getting denied access and then asked to cease and desist. Background Kensi/Deeks and Sheppard/Mitchell or simply gen. But no McShep or revealing the SGC, please.