While many of the Doctor Who viewers are probably counting their blessings that we wont have the Doctor talking to an oblivious Amy and Rory like we saw with Ten and Rose, it still offered a bit of closure for the Doctor as he regenerated, no matter how heartbreaking it was for us. We got to see the people Ten touched throughout his generation and watch him say goodbye to everyone. Eleven cant do that.
First off, theres the obvious fact that the Doctor cant go to New York to see Amy and Rory (and yes, Im with you guys, why cant he take a train from Boston?), but theres more he cant see any of the Ponds. Going by the cast list up on IMDb, none of the Ponds, or any of the Doctors friends will appear in this episode its likely that hell die in battle. Instead of a slow regeneration where he was sung to sleep, hell most likely have to rush into the TARDIS, regenerate, and continue to fight.
Im not gonna lie, this gives Twelve some great opening line possibilities, but it takes away the sentiment that came with Ten regenerating. However this does leave it open that his friends can come back. No, probably not Amy and Rory, but Strax, Vastra, Jenny, River, theyre all likely to come back. So from that aspect, maybe its good were not saying goodbye.
Though I will say this if there is anything Season 8 has shown us, its the incredible ability the Doctor Who graphics team has at putting the actors in older scenes. So maybe we get the goodbye anyway?