Left over items will be put up for sale on AM. Some stuff may come back in stock but be super limited. I know this happened with the Lohi's in the last drop. Don't count on it though.
And 4XL is slimmer and longer than last year. So yes, it will be huge.
On a side note, I'm glad they did that with 4XL since nobody buys it for anything besides skiing.
If you do, sorry.