Might start again, few questions!

[Volch0k]

Hi! I haven't played in 5 moths, since i was in a terrible car-accident. Now that i got my full strength back, i want to start playing a little bit again. All tho, i can see butt-loads of things has changed. I've been browsing different wow-forums, but i feel like i don't get it at all. Could anyone please tell me the biggest changes? The last thing i remember was trying PTR with target-loot and the new daily's?

First off, what emblems now drops from heroic bosses? Conquest? Triumph?
What are the new factions, and is there new daily quests?
I also heard about some new 40 man PVP battleground?

If anyone had time to explain me the biggest bits and pieces, i would appreciate it!
If it matters, i used to box a protection paladin with 4 shamans.

Edit: I just saw a video with a shaman putting out all his 4 totems at once, is this really TRUE? : d
Also, new 5 man dungeon?

Liliq