Also, I just wanted to provide an answer to this specifically about Wayne State. I was able to contact a current student and they gave me a good summary:
About ~36 interviewees were sent the email inviting them to a second look sometime in February or March. Of those 36, some were sent an invitation and some (the higher priority) were sent the modified sentence "we will be prepared to offer you an acceptance." This sentence and this second look are not an offer of acceptance, and attending is not required to receive an acceptance (as illness, covid, etc. can always happen). All 36 invitees (or those who accept to come and/or express continued interest) will have an interview with the Dean to gauge interest, sell the program, etc. The first interview was an evaluative screen. of the ~36 invitees, only around 10 will ever be offered an acceptance, and the school will not offer any more than 6 acceptances as they do not want to enroll. Having that extra "we will be prepared to offer...." line does not mean you have been accepted, but it was intentionally added. Not having that line in there does not mean you will not be accepted as you still can be (the current student I spoke with did not have this extra line).
Overall, it seems pretty standard to their process and now explained makes sense. I tried to avoid absolutes and certainties here and I don't have any more information, but just some clarification for anyone that got those emails and was confused.
Edit: just to clarify, I have not interviewed here. I have just become invested in making sure several of my friends who may be too nervous to ask have clarification, and just wanted to share the information with anyone else who may have gotten the emails.
Thanks for this, so it seems like if we weren't given an email at all, but interviewed, then this is basically a rejection?