I'm more eager for the Act 3/4 Intermission than chapter 1,000, to be frank. I hope it comes this year.
I really want more clues on what is happening in the wider world, and exposition chapters are usually pretty loaded with lore. I really want an update on the Shichibukai and what Teach is after.
Especially since I think the final members of both the Straw Hats and Blackbeards will come out of it.
What if I told you, that chapter 1,000 will be the intermission between Act 3 and 4?
Just my quick guess though, I think Act 3 should end around chapter 998 or 999.