Death Note alternate ending?

No.12700191 ViewReplyOriginalReport
Ok so I just watched the director's cut of Death Note and I'm a bit confused.
Does Light get to rule the world until the end of his long lifetime or does Ryuk kill him soon after L's death? It showed Light's name in Ryuk's notebook but it wasn't clear as to when Light actually died. What was the intended message supposed to be?

Also, a question about Misa: Since Gelus added his lifespan to hers, and then it was halved, and then halved again and then Rem gave Misa her lifespan as well, doesn't that mean that Misa will live for a really long time?

Any thoughts on either of these?