Hence, the protagonists went to college in 22 Jump Street, and 23 Jump Street: Men In Black 4 would see them enlist in yet another institution. Needless to say, there are a lot of question marks ...

However, in this context, Men in Black 4 refers to a hypothetical fourth movie with Smith and Jones, following up 2012’s Men in Black 3. From all accounts, a Men in Black 4 was in the works ...