Towards the bottom it lists the upcoming models/specs. H502, H502W, H600W, H302, H302W, H602, H602W are all coming sooner or later. I don't have any headlamps yet, was looking at the H501W but I think I'll wait for the H502W (XML version).
There are a lot of headlamps to be released by ZL in a few months. You can browse through Shenanigans` link.
I was thinking about getting an H51FW but then I saw that the H502W was to be released in a few months. I am now thinking whether to get the H502 or H502W.