I've been an Ice Age fan for a while now, but to say the truth I really don't like how FOX is only making sequels because they make money.
As I've said on my lenghty article, they need to have an appealing so that everyone goes to see it, sadly Ice Age: Th4w is likely to happen although not much anymore since if it were a rumor FOX spread on the net, it has gotten over control, I think if there's a fourth film it is only like 20% of being Th4w now.
Anyways, what I want to say is my proposed continuity to the series, I think we need a fourth and a fifth film, with at least Buck returning, I think Diego must find love in the fourth and Sid in the fifth, since he's the trigger for the adventures our friends have, he'd have to be the last one.
I'd like to see at the end of the series in a fifth film the herd disbans because they all have a family on their own, that's my proposed ending to the films.
Also, I can only say I really don't want Th4w, but we have to admit that it'd be awesome to see Buck in the urban jungle.