According to Supergirl executive producer Andrew Kreisberg, Cadmus in Season 2 will have the lab “remain more of an evil, specter-y thing that’s out there,” so Hank and Alex might initially fail in their mission to retrieve Jeremiah and never actually find Cadmus at all.
Hank and Alex are trying to find the location, mainly to retrieve Jeremiah Danvers, but it may not be so easy.
This, of course, means that the Supergirl allies will be trying to find that place and stop them for as long as it takes.
Now that Supergirl and her allies know about Project Cadmus, the secret genetic engineering lab where the government dissects alien prisoners for the military, expect it to be a big part of Season 2.