I've been thinking about this for a little bit, and was going to do it at the end of this phase, but I've decided to do it now.
From now on, for all challenges you can use whichever Star Trek you wish.
At the beginning I didn't want to because of the other Star Trek land community, but I don't think it matters. People can be in both if they wish! I know not everyone will have seen all of them, no challenges are going to directly need to have seen specific Treks. It's not going to affect challenges planned for this phase, a few will just be tweaked a little to accommodate. If you want to just use TOS/Reboot for challenge responses, you can 100%.
Questions/comments are welcome.