Patrick O'Brien wrote:
I thought Wesley rejoined Star Fleet? I could have sworn I saw him in a uniform at Troi and Rikers wedding in Nemesis? I could be wrong though
It never made sense that Wesley would just go back to Starfleet after a) growing frustrated with Starfleet and realizing it had never been the right path for him, just what he was expected to do by others, and b) evolving to a higher level of existence that would let him fulfill his true potential. So, fortunately, the novels (specifically A Time for War, A Time for Peace
) explained his presence at the wedding as only a temporary visit, and his presence in uniform as... well... a matter of convenience.