sta-tng-1_origSteveHanson from Modiphius posted on the Modiphius Star Trek forum:

There will be a play test once we put rules to paper. Right now we’re concerned with what does everyone want. The play test will be conducted like all of our play tests, pdf made available to those in the program. These are not open play tests but only for those who are approved. Each version or two there will be a survey. Source

All of which is to say, I hope we get in on the Star Trek Adventure beta, but it’s a closed playtest, so participation isn’t guaranteed.