Putting all the photos on one thread will be a mess with 2000 shots, plus peoples comments.
I suggest you start a subforum and group the photos by category or content. For instance, the "gore shots" would all be on one thread so they are easy to avoid.
Battlefield shots could be another thread. Behind the lines stuff in another etc. etc. Depends on how many and of what content to determine how many threads to run. However, 5-10 threads would disperse the pictures enough to make them easy to manage and find.
My 2 cents....
I can't wait to see them!!!!