Hi Thermal,
AirVenture isn't your regular airshow - it's a fly-in or a convention, so no one's really certain in advance what will turn up. Also, the EAA doesn't pay their airshow performers (they are all volunteers, although they do get their fuel reimbursed if they hold a commercial licence), so there are no contracts as with regular airshows.
If you would like to know what will be on static display: do you mean all 8,000+ aircraft?
Admittedly the EAA is late this year with publishing some information. Typically by now we would have had a list of performers per day, although that list would not be final until after the airshow has taken place. The allegedly final schedules are only posted on 2 or 3 buildings an hour or 2 before the daily airshow starts, but even then there are often changes during the afternoon itself. So even if your favourite Scruggs Wonderplane Mk V is only due to display at 5 pm, you'd better sit through all the flip-flopping acts so as not to miss what you really want to see.
If warbirds are your thing, keep an eye on this:
http://warbirds-eaa.org/events/airventure.html
The most detailed warbird flying schedule publicly available so far is here:
https://www.eaa.org/en/airventure/eaa-a ... g-schedule. But there have been Thursdays (which is typically the jet warbird day) when there was hardly any jet warbird in the airshow.
If you want to go to Oshkosh for current military (off the top of my head the following have been announced so far: C-5, KC-10, C-17, KC-46, HC-130P/N, KC-135, F-16, and an E-4 flyby, but there typically will also be a couple of T-6 Texans II, T-38s and some surprise visitors during the week): bring lots of patience. If you want to see them fly, your best chance is around (the final) Sunday lunch time, when a number of them typically depart (with the sun down the runway axis...). Your guess as to when they'll come in is as good as mine.
In other words: don't go to Oshkosh as you would to a typical (military) airshow, as you won't just annoy yourself, but probably everyone around you as well. (:-))
Roger