I didn't notice that actually default , lol , but I think that there were some around when rick and daryl conceal the weapons under the ground and that was on the back of the terminus.
I guess Michonne might not die, it was spoiled during an interview that Michonne and Rick will have a relationship on the series, although Mr. Andrew Lincoln could be trolling us I think they are indeed getting closer for a while now so it can make sense. To me Ty is the one I want more to survive ( And daryl since the begin, but Ty character development is very very intriguing and I truly like Chad Coleman work on it, it's probably the most underrated and well made interpretation that we've seen on TWD).
Yeah someone will surely die on the sanctuary, remains to be known who, but somehow I feel that it will be Sasha, she truly has a strong chance to die, bob can also die soon, but I'm seeing her dying first, just a hunch lol
Now about Ty and Carol not saving their group, I also think that inside the terminus they will also be the ones to start defending themselves, although there were 2 things on last episode that kept me thinking that something else might happen.
1) During Carl , Michonne and Rick begin , they find a guy fighting against walkers calling for help and dying, I think that guy is like the other 2 people that tyreese tried to save before Carol appeared when they were near the railway line, they must be somehow connected to terminus or something else, otherwise why would they show those people dying? To prove us there are still people alive, to remind us? I think everyone knows that many people are still alive everywhere around the globe, what remains to be known is where are they and who caused the begin of all of this.
2)As I mentioned earlier, Rick hid his arsenal of weapons before jumping the fence of the terminus people, I think he somehow knew what they were going on for, but at the same time, he also did that in hope that someone would come to their rescue that had the same idea as he did ( like when tyreese and Carol try to enter the terminus they go from behind the spot and find those weapons and know that inside that place something is not right and their friends are in there).