Personally, I do like the whole heel / face thing but it has been somewhat thwarted by fans appreciating wrestlers just for their talent. I hate that fans chant "this is awesome" at anything and everything nowadays as it ruins it somewhat. I've been watching some of the 2008 pay per views and Matt Hardy and MVP get louder pops then 3/4 of the roster nowadays and they were fighting over the US championship back then.
Crowds don't give as good reactions anymore, only a few get a good pop every time.
I think Lesnar should still be a heel just for how dislikeable he is. He really doesn't care about the fans yet he's still cheered.
Rollins is doing a good job as heel, mostly boos unless he's doing one of his big moves.
I think its too early for a Shield reunion and Orton turning doesn't make any sense. I see Kane trying to help Rollins but Rollins not taking the help too kindly and he attacks Kane. Kane will take his anger out on the other competitors as he doesn't want to lose his job helping Rollins to win but will turn face on raw when Rollins is trying to push him around and the authority aren't there. If he loses it it will also be due to Kane or perhaps Lesnar but I don't see Lesnar coming back yet.
I think it will be Kane vs Seth Rollins at Elimination chamber with Kane making the match on raw.
Ambrose in the elimination chamber for IC title.
Reigns vs Orton in a no.1 contenders match.