As it was stated before, ii-V progressions commonly resolve down to I. However, there are several other possible resolutions.
ii-V will sometimes resolve UPWARDS- this is called a "Backdoor" progression.
In these cases, the target chord is a whole step above the V7 chord.
Bbm7 to Eb7 to F6/9
(Please note that I did use a 6/9 chord instead of a Maj7 chord. These chords function the same way and are basically interchangeable)